./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe028_rmo.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/safe028_rmo.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/safe028_rmo.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe028_rmo.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 04:29:04,487 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 04:29:04,570 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 04:29:04,576 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 04:29:04,576 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 04:29:04,604 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 04:29:04,605 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 04:29:04,605 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 04:29:04,606 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 04:29:04,610 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 04:29:04,610 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 04:29:04,610 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 04:29:04,611 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 04:29:04,612 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 04:29:04,612 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 04:29:04,613 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 04:29:04,613 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 04:29:04,613 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 04:29:04,613 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 04:29:04,613 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 04:29:04,614 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 04:29:04,614 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 04:29:04,614 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 04:29:04,615 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 04:29:04,615 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 04:29:04,615 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 04:29:04,615 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 04:29:04,615 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 04:29:04,616 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 04:29:04,616 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 04:29:04,617 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 04:29:04,617 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 04:29:04,617 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 04:29:04,618 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 04:29:04,618 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 04:29:04,618 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 04:29:04,618 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 04:29:04,618 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 04:29:04,618 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 04:29:04,619 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 04:29:04,619 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 04:29:04,619 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 04:29:04,619 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 04:29:04,620 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 04:29:04,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 04:29:04,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 04:29:04,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 04:29:04,861 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 04:29:04,861 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 04:29:04,862 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe028_rmo.i [2024-06-28 04:29:05,893 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 04:29:06,120 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 04:29:06,120 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe028_rmo.i [2024-06-28 04:29:06,147 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b0085cf0/f2fc9f039c4949c89b16dd67caed467b/FLAGdfef2e924 [2024-06-28 04:29:06,158 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b0085cf0/f2fc9f039c4949c89b16dd67caed467b [2024-06-28 04:29:06,160 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 04:29:06,161 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 04:29:06,161 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe028_rmo.yml/witness.yml [2024-06-28 04:29:06,340 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 04:29:06,341 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 04:29:06,342 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 04:29:06,342 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 04:29:06,348 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 04:29:06,349 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 04:29:06" (1/2) ... [2024-06-28 04:29:06,354 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c55457c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:29:06, skipping insertion in model container [2024-06-28 04:29:06,354 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 04:29:06" (1/2) ... [2024-06-28 04:29:06,356 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@65ba00eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:29:06, skipping insertion in model container [2024-06-28 04:29:06,357 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:29:06" (2/2) ... [2024-06-28 04:29:06,357 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c55457c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:29:06, skipping insertion in model container [2024-06-28 04:29:06,357 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:29:06" (2/2) ... [2024-06-28 04:29:06,357 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 04:29:06,470 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 04:29:06,472 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ((((((((((((((((((((((((((((((((((((! multithreaded || x$w_buff0_used == (_Bool)0) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_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_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (y == 0 || y == 1)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0) [2024-06-28 04:29:06,472 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ((((((((((((((((((((((((((((((((((((! multithreaded || x$w_buff0_used == (_Bool)0) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$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$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (y == 0 || y == 1)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0) [2024-06-28 04:29:06,473 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ((((((((((((((((((((((((((((((((((((! multithreaded || x$w_buff0_used == (_Bool)0) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_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_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (y == 0 || y == 1)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0) [2024-06-28 04:29:06,473 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 04:29:06,473 INFO L106 edCorrectnessWitness]: ghost_update [L852-L852] multithreaded = 1; [2024-06-28 04:29:06,516 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 04:29:06,842 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 04:29:06,853 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 04:29:06,990 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 04:29:07,031 INFO L206 MainTranslator]: Completed translation [2024-06-28 04:29:07,032 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:29:07 WrapperNode [2024-06-28 04:29:07,032 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 04:29:07,033 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 04:29:07,034 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 04:29:07,034 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 04:29:07,039 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 04:29:07" (1/1) ... [2024-06-28 04:29:07,080 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 04:29:07" (1/1) ... [2024-06-28 04:29:07,120 INFO L138 Inliner]: procedures = 175, calls = 88, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 208 [2024-06-28 04:29:07,120 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 04:29:07,121 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 04:29:07,121 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 04:29:07,122 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 04:29:07,132 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 04:29:07" (1/1) ... [2024-06-28 04:29:07,132 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 04:29:07" (1/1) ... [2024-06-28 04:29:07,136 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 04:29:07" (1/1) ... [2024-06-28 04:29:07,155 INFO L175 MemorySlicer]: Split 47 memory accesses to 2 slices as follows [2, 45]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 8 writes are split as follows [0, 8]. [2024-06-28 04:29:07,165 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 04:29:07" (1/1) ... [2024-06-28 04:29:07,166 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 04:29:07" (1/1) ... [2024-06-28 04:29:07,177 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 04:29:07" (1/1) ... [2024-06-28 04:29:07,198 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 04:29:07" (1/1) ... [2024-06-28 04:29:07,201 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 04:29:07" (1/1) ... [2024-06-28 04:29:07,202 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 04:29:07" (1/1) ... [2024-06-28 04:29:07,206 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 04:29:07,207 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 04:29:07,207 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 04:29:07,207 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 04:29:07,207 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 04:29:07" (1/1) ... [2024-06-28 04:29:07,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 04:29:07,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 04:29:07,258 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 04:29:07,275 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 04:29:07,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 04:29:07,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 04:29:07,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 04:29:07,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 04:29:07,294 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 04:29:07,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 04:29:07,294 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 04:29:07,295 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 04:29:07,295 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 04:29:07,295 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 04:29:07,295 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 04:29:07,295 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 04:29:07,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 04:29:07,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 04:29:07,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 04:29:07,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 04:29:07,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 04:29:07,298 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 04:29:07,450 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 04:29:07,452 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 04:29:07,947 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 04:29:07,947 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 04:29:08,341 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 04:29:08,341 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 04:29:08,342 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 04:29:08 BoogieIcfgContainer [2024-06-28 04:29:08,342 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 04:29:08,344 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 04:29:08,344 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 04:29:08,347 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 04:29:08,347 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 04:29:06" (1/4) ... [2024-06-28 04:29:08,347 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4598d27b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 04:29:08, skipping insertion in model container [2024-06-28 04:29:08,347 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:29:06" (2/4) ... [2024-06-28 04:29:08,348 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4598d27b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 04:29:08, skipping insertion in model container [2024-06-28 04:29:08,348 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 04:29:07" (3/4) ... [2024-06-28 04:29:08,348 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4598d27b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 04:29:08, skipping insertion in model container [2024-06-28 04:29:08,348 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 04:29:08" (4/4) ... [2024-06-28 04:29:08,349 INFO L112 eAbstractionObserver]: Analyzing ICFG safe028_rmo.i [2024-06-28 04:29:08,362 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 04:29:08,363 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 04:29:08,363 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 04:29:08,413 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 04:29:08,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 04:29:08,473 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-28 04:29:08,474 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 04:29:08,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 54 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 04:29:08,475 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 04:29:08,478 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-28 04:29:08,488 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 04:29:08,494 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;@682978a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 04:29:08,494 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 04:29:08,499 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 04:29:08,499 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-28 04:29:08,499 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 04:29:08,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:08,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 04:29:08,500 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 04:29:08,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:08,506 INFO L85 PathProgramCache]: Analyzing trace with hash 759262365, now seen corresponding path program 1 times [2024-06-28 04:29:08,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:08,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647898561] [2024-06-28 04:29:08,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:08,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:10,250 INFO 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 04:29:10,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:10,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647898561] [2024-06-28 04:29:10,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647898561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:10,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:10,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 04:29:10,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678567653] [2024-06-28 04:29:10,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:10,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 04:29:10,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:10,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 04:29:10,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 04:29:10,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 04:29:10,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states 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 04:29:10,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:10,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 04:29:10,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:10,694 INFO L124 PetriNetUnfolderBase]: 990/1587 cut-off events. [2024-06-28 04:29:10,694 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-28 04:29:10,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3167 conditions, 1587 events. 990/1587 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7699 event pairs, 650 based on Foata normal form. 1/1558 useless extension candidates. Maximal degree in co-relation 3155. Up to 1503 conditions per place. [2024-06-28 04:29:10,705 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-28 04:29:10,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 181 flow [2024-06-28 04:29:10,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 04:29:10,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 04:29:10,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-28 04:29:10,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-28 04:29:10,716 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 71 transitions. [2024-06-28 04:29:10,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 181 flow [2024-06-28 04:29:10,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 04:29:10,720 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-28 04:29:10,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-28 04:29:10,723 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-28 04:29:10,723 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-28 04:29:10,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states 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 04:29:10,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:10,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:10,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 04:29:10,724 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 04:29:10,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:10,725 INFO L85 PathProgramCache]: Analyzing trace with hash -492950362, now seen corresponding path program 1 times [2024-06-28 04:29:10,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:10,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275397197] [2024-06-28 04:29:10,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:10,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:10,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:11,947 INFO 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 04:29:11,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:11,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275397197] [2024-06-28 04:29:11,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275397197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:11,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:11,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 04:29:11,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495950255] [2024-06-28 04:29:11,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:11,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 04:29:11,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:11,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 04:29:11,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 04:29:11,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:29:11,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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 04:29:11,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:11,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:29:11,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:12,311 INFO L124 PetriNetUnfolderBase]: 1148/1764 cut-off events. [2024-06-28 04:29:12,312 INFO L125 PetriNetUnfolderBase]: For 341/341 co-relation queries the response was YES. [2024-06-28 04:29:12,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4058 conditions, 1764 events. 1148/1764 cut-off events. For 341/341 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8218 event pairs, 521 based on Foata normal form. 6/1769 useless extension candidates. Maximal degree in co-relation 4046. Up to 1692 conditions per place. [2024-06-28 04:29:12,320 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 45 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-06-28 04:29:12,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 58 transitions, 262 flow [2024-06-28 04:29:12,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 04:29:12,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 04:29:12,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-06-28 04:29:12,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-28 04:29:12,322 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 91 transitions. [2024-06-28 04:29:12,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 58 transitions, 262 flow [2024-06-28 04:29:12,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 58 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 04:29:12,324 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-28 04:29:12,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-28 04:29:12,325 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-28 04:29:12,325 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-28 04:29:12,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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 04:29:12,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:12,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:12,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 04:29:12,326 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 04:29:12,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:12,326 INFO L85 PathProgramCache]: Analyzing trace with hash -617306588, now seen corresponding path program 1 times [2024-06-28 04:29:12,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:12,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346855931] [2024-06-28 04:29:12,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:12,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:14,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:29:14,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:14,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346855931] [2024-06-28 04:29:14,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346855931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:14,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:14,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:29:14,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264873358] [2024-06-28 04:29:14,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:14,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:29:14,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:14,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:29:14,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:29:14,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:29:14,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states 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 04:29:14,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:14,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:29:14,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:15,481 INFO L124 PetriNetUnfolderBase]: 1139/1749 cut-off events. [2024-06-28 04:29:15,481 INFO L125 PetriNetUnfolderBase]: For 964/964 co-relation queries the response was YES. [2024-06-28 04:29:15,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4493 conditions, 1749 events. 1139/1749 cut-off events. For 964/964 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8141 event pairs, 375 based on Foata normal form. 6/1754 useless extension candidates. Maximal degree in co-relation 4479. Up to 1639 conditions per place. [2024-06-28 04:29:15,489 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 58 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-06-28 04:29:15,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 76 transitions, 380 flow [2024-06-28 04:29:15,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:29:15,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:29:15,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-28 04:29:15,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2024-06-28 04:29:15,493 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 127 transitions. [2024-06-28 04:29:15,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 76 transitions, 380 flow [2024-06-28 04:29:15,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 76 transitions, 360 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-28 04:29:15,495 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-28 04:29:15,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-28 04:29:15,496 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-28 04:29:15,496 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-28 04:29:15,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states 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 04:29:15,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:15,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:15,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 04:29:15,497 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 04:29:15,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:15,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1360734269, now seen corresponding path program 1 times [2024-06-28 04:29:15,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:15,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351879583] [2024-06-28 04:29:15,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:15,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:15,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:16,825 INFO 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 04:29:16,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:16,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351879583] [2024-06-28 04:29:16,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351879583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:16,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:16,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:29:16,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596752243] [2024-06-28 04:29:16,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:16,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:29:16,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:16,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:29:16,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:29:16,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:29:16,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 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 04:29:16,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:16,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:29:16,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:17,579 INFO L124 PetriNetUnfolderBase]: 959/1558 cut-off events. [2024-06-28 04:29:17,580 INFO L125 PetriNetUnfolderBase]: For 1579/1579 co-relation queries the response was YES. [2024-06-28 04:29:17,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4320 conditions, 1558 events. 959/1558 cut-off events. For 1579/1579 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7517 event pairs, 367 based on Foata normal form. 4/1561 useless extension candidates. Maximal degree in co-relation 4303. Up to 1434 conditions per place. [2024-06-28 04:29:17,587 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 47 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-28 04:29:17,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 61 transitions, 341 flow [2024-06-28 04:29:17,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:29:17,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:29:17,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-28 04:29:17,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-28 04:29:17,589 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 94 transitions. [2024-06-28 04:29:17,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 61 transitions, 341 flow [2024-06-28 04:29:17,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 314 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 04:29:17,595 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-28 04:29:17,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-28 04:29:17,596 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-28 04:29:17,596 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-28 04:29:17,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 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 04:29:17,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:17,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:17,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 04:29:17,597 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 04:29:17,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:17,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1900309014, now seen corresponding path program 1 times [2024-06-28 04:29:17,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:17,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406206464] [2024-06-28 04:29:17,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:17,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:17,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:19,453 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 04:29:19,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:19,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406206464] [2024-06-28 04:29:19,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406206464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:19,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:19,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:29:19,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634762798] [2024-06-28 04:29:19,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:19,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:29:19,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:19,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:29:19,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:29:19,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:29:19,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:19,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:19,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:29:19,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:20,498 INFO L124 PetriNetUnfolderBase]: 1155/1787 cut-off events. [2024-06-28 04:29:20,499 INFO L125 PetriNetUnfolderBase]: For 2717/2719 co-relation queries the response was YES. [2024-06-28 04:29:20,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5430 conditions, 1787 events. 1155/1787 cut-off events. For 2717/2719 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8340 event pairs, 420 based on Foata normal form. 6/1792 useless extension candidates. Maximal degree in co-relation 5411. Up to 1642 conditions per place. [2024-06-28 04:29:20,508 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 59 selfloop transitions, 16 changer transitions 0/80 dead transitions. [2024-06-28 04:29:20,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 80 transitions, 466 flow [2024-06-28 04:29:20,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:29:20,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:29:20,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-28 04:29:20,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-28 04:29:20,513 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 6 states and 116 transitions. [2024-06-28 04:29:20,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 80 transitions, 466 flow [2024-06-28 04:29:20,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 80 transitions, 446 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 04:29:20,520 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 260 flow [2024-06-28 04:29:20,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2024-06-28 04:29:20,522 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-28 04:29:20,522 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 260 flow [2024-06-28 04:29:20,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:20,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:20,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:20,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 04:29:20,523 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 04:29:20,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:20,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1918968534, now seen corresponding path program 2 times [2024-06-28 04:29:20,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:20,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055740699] [2024-06-28 04:29:20,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:20,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:22,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:29:22,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:22,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055740699] [2024-06-28 04:29:22,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055740699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:22,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:22,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:29:22,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924398189] [2024-06-28 04:29:22,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:22,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:29:22,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:22,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:29:22,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:29:22,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:29:22,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 260 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:22,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:22,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:29:22,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:23,202 INFO L124 PetriNetUnfolderBase]: 1145/1764 cut-off events. [2024-06-28 04:29:23,202 INFO L125 PetriNetUnfolderBase]: For 3870/3870 co-relation queries the response was YES. [2024-06-28 04:29:23,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5819 conditions, 1764 events. 1145/1764 cut-off events. For 3870/3870 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8237 event pairs, 419 based on Foata normal form. 4/1765 useless extension candidates. Maximal degree in co-relation 5799. Up to 1634 conditions per place. [2024-06-28 04:29:23,211 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 52 selfloop transitions, 16 changer transitions 0/73 dead transitions. [2024-06-28 04:29:23,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 73 transitions, 446 flow [2024-06-28 04:29:23,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:29:23,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:29:23,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-28 04:29:23,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-28 04:29:23,213 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 260 flow. Second operand 6 states and 109 transitions. [2024-06-28 04:29:23,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 73 transitions, 446 flow [2024-06-28 04:29:23,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 73 transitions, 416 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-28 04:29:23,218 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 270 flow [2024-06-28 04:29:23,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-06-28 04:29:23,221 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-28 04:29:23,221 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 270 flow [2024-06-28 04:29:23,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:23,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:23,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:23,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 04:29:23,222 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 04:29:23,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:23,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1995614876, now seen corresponding path program 1 times [2024-06-28 04:29:23,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:23,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311830130] [2024-06-28 04:29:23,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:23,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:25,756 INFO 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 04:29:25,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:25,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311830130] [2024-06-28 04:29:25,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311830130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:25,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:25,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:29:25,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902279650] [2024-06-28 04:29:25,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:25,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:29:25,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:25,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:29:25,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:29:25,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:29:25,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 270 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 04:29:25,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:25,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:29:25,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:26,602 INFO L124 PetriNetUnfolderBase]: 967/1578 cut-off events. [2024-06-28 04:29:26,602 INFO L125 PetriNetUnfolderBase]: For 3797/3797 co-relation queries the response was YES. [2024-06-28 04:29:26,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5179 conditions, 1578 events. 967/1578 cut-off events. For 3797/3797 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7633 event pairs, 333 based on Foata normal form. 4/1581 useless extension candidates. Maximal degree in co-relation 5157. Up to 1424 conditions per place. [2024-06-28 04:29:26,609 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 59 selfloop transitions, 10 changer transitions 0/75 dead transitions. [2024-06-28 04:29:26,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 75 transitions, 476 flow [2024-06-28 04:29:26,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:29:26,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:29:26,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-28 04:29:26,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-28 04:29:26,611 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 270 flow. Second operand 6 states and 111 transitions. [2024-06-28 04:29:26,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 75 transitions, 476 flow [2024-06-28 04:29:26,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 75 transitions, 432 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 04:29:26,615 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 275 flow [2024-06-28 04:29:26,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=275, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-06-28 04:29:26,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-28 04:29:26,616 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 275 flow [2024-06-28 04:29:26,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 04:29:26,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:26,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:26,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 04:29:26,617 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 04:29:26,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:26,617 INFO L85 PathProgramCache]: Analyzing trace with hash 831133461, now seen corresponding path program 1 times [2024-06-28 04:29:26,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:26,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434081909] [2024-06-28 04:29:26,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:26,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:28,991 INFO 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 04:29:28,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:28,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434081909] [2024-06-28 04:29:28,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434081909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:28,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:28,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:29:28,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287495926] [2024-06-28 04:29:28,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:28,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:29:28,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:28,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:29:28,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:29:29,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:29:29,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 275 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:29,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:29,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:29:29,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:30,048 INFO L124 PetriNetUnfolderBase]: 1163/1803 cut-off events. [2024-06-28 04:29:30,048 INFO L125 PetriNetUnfolderBase]: For 5839/5839 co-relation queries the response was YES. [2024-06-28 04:29:30,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6230 conditions, 1803 events. 1163/1803 cut-off events. For 5839/5839 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8464 event pairs, 436 based on Foata normal form. 4/1806 useless extension candidates. Maximal degree in co-relation 6208. Up to 1691 conditions per place. [2024-06-28 04:29:30,057 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 71 selfloop transitions, 14 changer transitions 0/90 dead transitions. [2024-06-28 04:29:30,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 90 transitions, 549 flow [2024-06-28 04:29:30,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:29:30,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:29:30,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-28 04:29:30,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-28 04:29:30,060 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 275 flow. Second operand 7 states and 130 transitions. [2024-06-28 04:29:30,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 90 transitions, 549 flow [2024-06-28 04:29:30,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 90 transitions, 518 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-28 04:29:30,064 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 310 flow [2024-06-28 04:29:30,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=310, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-28 04:29:30,066 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-28 04:29:30,066 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 310 flow [2024-06-28 04:29:30,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:30,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:30,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:30,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 04:29:30,067 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 04:29:30,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:30,067 INFO L85 PathProgramCache]: Analyzing trace with hash 200765167, now seen corresponding path program 2 times [2024-06-28 04:29:30,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:30,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293686792] [2024-06-28 04:29:30,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:30,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:32,416 INFO 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 04:29:32,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:32,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293686792] [2024-06-28 04:29:32,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293686792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:32,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:32,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:29:32,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16245515] [2024-06-28 04:29:32,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:32,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:29:32,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:32,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:29:32,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:29:32,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:29:32,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 310 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:32,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:32,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:29:32,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:33,443 INFO L124 PetriNetUnfolderBase]: 1189/1861 cut-off events. [2024-06-28 04:29:33,443 INFO L125 PetriNetUnfolderBase]: For 7661/7665 co-relation queries the response was YES. [2024-06-28 04:29:33,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6806 conditions, 1861 events. 1189/1861 cut-off events. For 7661/7665 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8868 event pairs, 380 based on Foata normal form. 8/1868 useless extension candidates. Maximal degree in co-relation 6783. Up to 1595 conditions per place. [2024-06-28 04:29:33,452 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 66 selfloop transitions, 26 changer transitions 0/97 dead transitions. [2024-06-28 04:29:33,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 97 transitions, 666 flow [2024-06-28 04:29:33,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:29:33,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:29:33,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-28 04:29:33,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-28 04:29:33,455 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 310 flow. Second operand 7 states and 135 transitions. [2024-06-28 04:29:33,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 97 transitions, 666 flow [2024-06-28 04:29:33,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 97 transitions, 624 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 04:29:33,461 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 394 flow [2024-06-28 04:29:33,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=394, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-06-28 04:29:33,461 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-28 04:29:33,462 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 394 flow [2024-06-28 04:29:33,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:33,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:33,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:33,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 04:29:33,462 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 04:29:33,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:33,463 INFO L85 PathProgramCache]: Analyzing trace with hash 835902005, now seen corresponding path program 1 times [2024-06-28 04:29:33,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:33,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730897641] [2024-06-28 04:29:33,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:33,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:36,227 INFO 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 04:29:36,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:36,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730897641] [2024-06-28 04:29:36,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730897641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:36,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:36,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:29:36,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62135202] [2024-06-28 04:29:36,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:36,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:29:36,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:36,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:29:36,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:29:36,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:29:36,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 394 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:36,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:36,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:29:36,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:37,361 INFO L124 PetriNetUnfolderBase]: 1209/1893 cut-off events. [2024-06-28 04:29:37,361 INFO L125 PetriNetUnfolderBase]: For 9936/9940 co-relation queries the response was YES. [2024-06-28 04:29:37,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7360 conditions, 1893 events. 1209/1893 cut-off events. For 9936/9940 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9075 event pairs, 391 based on Foata normal form. 8/1900 useless extension candidates. Maximal degree in co-relation 7336. Up to 1708 conditions per place. [2024-06-28 04:29:37,370 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 74 selfloop transitions, 18 changer transitions 0/97 dead transitions. [2024-06-28 04:29:37,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 97 transitions, 676 flow [2024-06-28 04:29:37,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:29:37,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:29:37,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-28 04:29:37,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-28 04:29:37,372 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 394 flow. Second operand 7 states and 130 transitions. [2024-06-28 04:29:37,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 97 transitions, 676 flow [2024-06-28 04:29:37,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 97 transitions, 636 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-28 04:29:37,379 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 423 flow [2024-06-28 04:29:37,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=423, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2024-06-28 04:29:37,380 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-28 04:29:37,380 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 423 flow [2024-06-28 04:29:37,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:37,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:37,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:37,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 04:29:37,381 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 04:29:37,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:37,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1290272035, now seen corresponding path program 3 times [2024-06-28 04:29:37,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:37,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600205947] [2024-06-28 04:29:37,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:37,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:37,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:39,583 INFO 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 04:29:39,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:39,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600205947] [2024-06-28 04:29:39,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600205947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:39,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:39,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:29:39,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851831727] [2024-06-28 04:29:39,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:39,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:29:39,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:39,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:29:39,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:29:39,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:29:39,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 423 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:39,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:39,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:29:39,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:40,634 INFO L124 PetriNetUnfolderBase]: 1199/1863 cut-off events. [2024-06-28 04:29:40,635 INFO L125 PetriNetUnfolderBase]: For 11488/11488 co-relation queries the response was YES. [2024-06-28 04:29:40,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7568 conditions, 1863 events. 1199/1863 cut-off events. For 11488/11488 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8863 event pairs, 392 based on Foata normal form. 4/1862 useless extension candidates. Maximal degree in co-relation 7542. Up to 1619 conditions per place. [2024-06-28 04:29:40,645 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 61 selfloop transitions, 26 changer transitions 0/92 dead transitions. [2024-06-28 04:29:40,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 92 transitions, 661 flow [2024-06-28 04:29:40,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:29:40,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:29:40,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-28 04:29:40,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-28 04:29:40,647 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 423 flow. Second operand 7 states and 128 transitions. [2024-06-28 04:29:40,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 92 transitions, 661 flow [2024-06-28 04:29:40,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 92 transitions, 594 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-28 04:29:40,660 INFO L231 Difference]: Finished difference. Result has 70 places, 65 transitions, 416 flow [2024-06-28 04:29:40,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=416, PETRI_PLACES=70, PETRI_TRANSITIONS=65} [2024-06-28 04:29:40,660 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-28 04:29:40,660 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 65 transitions, 416 flow [2024-06-28 04:29:40,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:40,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:40,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:40,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 04:29:40,661 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 04:29:40,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:40,662 INFO L85 PathProgramCache]: Analyzing trace with hash -2064750723, now seen corresponding path program 2 times [2024-06-28 04:29:40,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:40,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140152974] [2024-06-28 04:29:40,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:40,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:40,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:43,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:29:43,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:43,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140152974] [2024-06-28 04:29:43,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140152974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:43,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:43,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:29:43,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932987039] [2024-06-28 04:29:43,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:43,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:29:43,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:43,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:29:43,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:29:43,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:29:43,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 65 transitions, 416 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:43,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:43,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:29:43,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:44,395 INFO L124 PetriNetUnfolderBase]: 1219/1908 cut-off events. [2024-06-28 04:29:44,395 INFO L125 PetriNetUnfolderBase]: For 13068/13068 co-relation queries the response was YES. [2024-06-28 04:29:44,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7841 conditions, 1908 events. 1219/1908 cut-off events. For 13068/13068 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9112 event pairs, 390 based on Foata normal form. 4/1909 useless extension candidates. Maximal degree in co-relation 7814. Up to 1726 conditions per place. [2024-06-28 04:29:44,405 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 71 selfloop transitions, 20 changer transitions 0/96 dead transitions. [2024-06-28 04:29:44,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 96 transitions, 700 flow [2024-06-28 04:29:44,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:29:44,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:29:44,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 04:29:44,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-28 04:29:44,413 INFO L175 Difference]: Start difference. First operand has 70 places, 65 transitions, 416 flow. Second operand 8 states and 135 transitions. [2024-06-28 04:29:44,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 96 transitions, 700 flow [2024-06-28 04:29:44,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 96 transitions, 631 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 04:29:44,421 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 437 flow [2024-06-28 04:29:44,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=437, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2024-06-28 04:29:44,422 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-28 04:29:44,422 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 437 flow [2024-06-28 04:29:44,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:44,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:44,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:44,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 04:29:44,423 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 04:29:44,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:44,423 INFO L85 PathProgramCache]: Analyzing trace with hash -2064454053, now seen corresponding path program 3 times [2024-06-28 04:29:44,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:44,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694730370] [2024-06-28 04:29:44,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:44,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:47,019 INFO 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 04:29:47,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:47,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694730370] [2024-06-28 04:29:47,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694730370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:47,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:47,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:29:47,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833121025] [2024-06-28 04:29:47,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:47,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:29:47,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:47,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:29:47,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:29:47,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:29:47,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 437 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:47,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:47,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:29:47,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:47,832 INFO L124 PetriNetUnfolderBase]: 1211/1896 cut-off events. [2024-06-28 04:29:47,832 INFO L125 PetriNetUnfolderBase]: For 14763/14763 co-relation queries the response was YES. [2024-06-28 04:29:47,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7958 conditions, 1896 events. 1211/1896 cut-off events. For 14763/14763 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9127 event pairs, 366 based on Foata normal form. 4/1897 useless extension candidates. Maximal degree in co-relation 7929. Up to 1642 conditions per place. [2024-06-28 04:29:47,864 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 68 selfloop transitions, 24 changer transitions 0/97 dead transitions. [2024-06-28 04:29:47,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 97 transitions, 713 flow [2024-06-28 04:29:47,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:29:47,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:29:47,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-28 04:29:47,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-28 04:29:47,866 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 437 flow. Second operand 7 states and 125 transitions. [2024-06-28 04:29:47,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 97 transitions, 713 flow [2024-06-28 04:29:47,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 97 transitions, 663 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-28 04:29:47,876 INFO L231 Difference]: Finished difference. Result has 76 places, 71 transitions, 476 flow [2024-06-28 04:29:47,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=476, PETRI_PLACES=76, PETRI_TRANSITIONS=71} [2024-06-28 04:29:47,878 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-28 04:29:47,878 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 71 transitions, 476 flow [2024-06-28 04:29:47,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:47,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:47,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:47,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 04:29:47,879 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:29:47,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:47,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1505743332, now seen corresponding path program 1 times [2024-06-28 04:29:47,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:47,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423097013] [2024-06-28 04:29:47,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:47,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:47,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:49,612 INFO 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 04:29:49,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:49,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423097013] [2024-06-28 04:29:49,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423097013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:49,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:49,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:29:49,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930624307] [2024-06-28 04:29:49,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:49,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:29:49,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:49,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:29:49,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:29:49,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:29:49,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 71 transitions, 476 flow. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:49,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:49,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:29:49,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:50,229 INFO L124 PetriNetUnfolderBase]: 1035/1698 cut-off events. [2024-06-28 04:29:50,230 INFO L125 PetriNetUnfolderBase]: For 13628/13628 co-relation queries the response was YES. [2024-06-28 04:29:50,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7139 conditions, 1698 events. 1035/1698 cut-off events. For 13628/13628 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 8335 event pairs, 357 based on Foata normal form. 2/1699 useless extension candidates. Maximal degree in co-relation 7108. Up to 1568 conditions per place. [2024-06-28 04:29:50,239 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 71 selfloop transitions, 8 changer transitions 0/85 dead transitions. [2024-06-28 04:29:50,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 85 transitions, 681 flow [2024-06-28 04:29:50,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:29:50,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:29:50,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-28 04:29:50,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-28 04:29:50,241 INFO L175 Difference]: Start difference. First operand has 76 places, 71 transitions, 476 flow. Second operand 5 states and 89 transitions. [2024-06-28 04:29:50,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 85 transitions, 681 flow [2024-06-28 04:29:50,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 85 transitions, 610 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-28 04:29:50,252 INFO L231 Difference]: Finished difference. Result has 76 places, 74 transitions, 451 flow [2024-06-28 04:29:50,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=451, PETRI_PLACES=76, PETRI_TRANSITIONS=74} [2024-06-28 04:29:50,253 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-28 04:29:50,253 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 74 transitions, 451 flow [2024-06-28 04:29:50,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:50,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:50,254 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 04:29:50,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 04:29:50,254 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:29:50,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:50,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1327056198, now seen corresponding path program 1 times [2024-06-28 04:29:50,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:50,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944999723] [2024-06-28 04:29:50,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:50,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:53,237 INFO 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 04:29:53,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:53,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944999723] [2024-06-28 04:29:53,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944999723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:53,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:53,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:29:53,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038978651] [2024-06-28 04:29:53,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:53,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:29:53,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:53,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:29:53,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:29:53,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:29:53,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 74 transitions, 451 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:53,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:53,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:29:53,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:54,244 INFO L124 PetriNetUnfolderBase]: 1394/2205 cut-off events. [2024-06-28 04:29:54,244 INFO L125 PetriNetUnfolderBase]: For 23163/23163 co-relation queries the response was YES. [2024-06-28 04:29:54,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9915 conditions, 2205 events. 1394/2205 cut-off events. For 23163/23163 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11080 event pairs, 374 based on Foata normal form. 16/2220 useless extension candidates. Maximal degree in co-relation 9883. Up to 1733 conditions per place. [2024-06-28 04:29:54,271 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 105 selfloop transitions, 19 changer transitions 0/129 dead transitions. [2024-06-28 04:29:54,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 129 transitions, 952 flow [2024-06-28 04:29:54,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:29:54,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:29:54,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-28 04:29:54,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-28 04:29:54,282 INFO L175 Difference]: Start difference. First operand has 76 places, 74 transitions, 451 flow. Second operand 9 states and 170 transitions. [2024-06-28 04:29:54,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 129 transitions, 952 flow [2024-06-28 04:29:54,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 129 transitions, 928 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-28 04:29:54,301 INFO L231 Difference]: Finished difference. Result has 82 places, 76 transitions, 521 flow [2024-06-28 04:29:54,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=521, PETRI_PLACES=82, PETRI_TRANSITIONS=76} [2024-06-28 04:29:54,303 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-28 04:29:54,303 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 76 transitions, 521 flow [2024-06-28 04:29:54,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:54,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:54,304 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 04:29:54,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 04:29:54,304 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 04:29:54,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:54,304 INFO L85 PathProgramCache]: Analyzing trace with hash -144625644, now seen corresponding path program 2 times [2024-06-28 04:29:54,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:54,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100944574] [2024-06-28 04:29:54,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:54,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:54,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:57,263 INFO 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 04:29:57,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:57,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100944574] [2024-06-28 04:29:57,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100944574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:57,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:57,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:29:57,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856370367] [2024-06-28 04:29:57,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:57,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:29:57,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:57,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:29:57,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:29:57,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:29:57,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 76 transitions, 521 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:57,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:57,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:29:57,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:58,370 INFO L124 PetriNetUnfolderBase]: 1358/2149 cut-off events. [2024-06-28 04:29:58,370 INFO L125 PetriNetUnfolderBase]: For 24081/24081 co-relation queries the response was YES. [2024-06-28 04:29:58,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9646 conditions, 2149 events. 1358/2149 cut-off events. For 24081/24081 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10731 event pairs, 467 based on Foata normal form. 20/2168 useless extension candidates. Maximal degree in co-relation 9613. Up to 1873 conditions per place. [2024-06-28 04:29:58,382 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 97 selfloop transitions, 16 changer transitions 0/118 dead transitions. [2024-06-28 04:29:58,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 118 transitions, 866 flow [2024-06-28 04:29:58,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:29:58,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:29:58,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 04:29:58,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-28 04:29:58,384 INFO L175 Difference]: Start difference. First operand has 82 places, 76 transitions, 521 flow. Second operand 8 states and 149 transitions. [2024-06-28 04:29:58,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 118 transitions, 866 flow [2024-06-28 04:29:58,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 118 transitions, 822 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 04:29:58,401 INFO L231 Difference]: Finished difference. Result has 85 places, 76 transitions, 516 flow [2024-06-28 04:29:58,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=516, PETRI_PLACES=85, PETRI_TRANSITIONS=76} [2024-06-28 04:29:58,402 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-28 04:29:58,402 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 76 transitions, 516 flow [2024-06-28 04:29:58,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:58,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:58,403 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 04:29:58,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 04:29:58,403 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:29:58,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:58,403 INFO L85 PathProgramCache]: Analyzing trace with hash 136304660, now seen corresponding path program 3 times [2024-06-28 04:29:58,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:58,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049173790] [2024-06-28 04:29:58,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:58,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:00,953 INFO 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 04:30:00,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:00,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049173790] [2024-06-28 04:30:00,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049173790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:00,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:00,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:30:00,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058312358] [2024-06-28 04:30:00,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:00,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:30:00,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:00,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:30:00,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:30:00,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:30:00,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 76 transitions, 516 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:00,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:00,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:30:00,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:02,392 INFO L124 PetriNetUnfolderBase]: 1446/2323 cut-off events. [2024-06-28 04:30:02,393 INFO L125 PetriNetUnfolderBase]: For 26957/26961 co-relation queries the response was YES. [2024-06-28 04:30:02,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10334 conditions, 2323 events. 1446/2323 cut-off events. For 26957/26961 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11921 event pairs, 407 based on Foata normal form. 24/2346 useless extension candidates. Maximal degree in co-relation 10299. Up to 1893 conditions per place. [2024-06-28 04:30:02,403 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 87 selfloop transitions, 27 changer transitions 0/119 dead transitions. [2024-06-28 04:30:02,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 119 transitions, 887 flow [2024-06-28 04:30:02,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:30:02,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:30:02,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 04:30:02,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 04:30:02,406 INFO L175 Difference]: Start difference. First operand has 85 places, 76 transitions, 516 flow. Second operand 8 states and 152 transitions. [2024-06-28 04:30:02,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 119 transitions, 887 flow [2024-06-28 04:30:02,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 119 transitions, 850 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-28 04:30:02,421 INFO L231 Difference]: Finished difference. Result has 86 places, 77 transitions, 568 flow [2024-06-28 04:30:02,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=568, PETRI_PLACES=86, PETRI_TRANSITIONS=77} [2024-06-28 04:30:02,421 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-28 04:30:02,421 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 77 transitions, 568 flow [2024-06-28 04:30:02,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:02,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:02,422 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 04:30:02,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 04:30:02,422 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 04:30:02,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:02,436 INFO L85 PathProgramCache]: Analyzing trace with hash -331496242, now seen corresponding path program 1 times [2024-06-28 04:30:02,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:02,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523037769] [2024-06-28 04:30:02,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:02,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:02,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:05,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:05,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523037769] [2024-06-28 04:30:05,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523037769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:05,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:05,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:30:05,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444115754] [2024-06-28 04:30:05,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:05,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:30:05,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:05,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:30:05,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:30:05,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:30:05,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 77 transitions, 568 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:05,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:05,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:30:05,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:06,710 INFO L124 PetriNetUnfolderBase]: 1494/2401 cut-off events. [2024-06-28 04:30:06,711 INFO L125 PetriNetUnfolderBase]: For 29915/29919 co-relation queries the response was YES. [2024-06-28 04:30:06,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10945 conditions, 2401 events. 1494/2401 cut-off events. For 29915/29919 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12512 event pairs, 403 based on Foata normal form. 16/2416 useless extension candidates. Maximal degree in co-relation 10909. Up to 1725 conditions per place. [2024-06-28 04:30:06,768 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 87 selfloop transitions, 30 changer transitions 0/122 dead transitions. [2024-06-28 04:30:06,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 122 transitions, 957 flow [2024-06-28 04:30:06,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:30:06,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:30:06,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-28 04:30:06,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-28 04:30:06,771 INFO L175 Difference]: Start difference. First operand has 86 places, 77 transitions, 568 flow. Second operand 8 states and 153 transitions. [2024-06-28 04:30:06,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 122 transitions, 957 flow [2024-06-28 04:30:06,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 122 transitions, 892 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 04:30:06,805 INFO L231 Difference]: Finished difference. Result has 88 places, 78 transitions, 599 flow [2024-06-28 04:30:06,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=599, PETRI_PLACES=88, PETRI_TRANSITIONS=78} [2024-06-28 04:30:06,806 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-28 04:30:06,806 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 78 transitions, 599 flow [2024-06-28 04:30:06,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:06,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:06,806 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 04:30:06,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 04:30:06,807 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:06,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:06,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1173326885, now seen corresponding path program 1 times [2024-06-28 04:30:06,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:06,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650331289] [2024-06-28 04:30:06,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:06,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:06,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:08,835 INFO 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 04:30:08,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:08,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650331289] [2024-06-28 04:30:08,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650331289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:08,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:08,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:30:08,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495974618] [2024-06-28 04:30:08,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:08,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:30:08,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:08,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:30:08,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:30:08,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:30:08,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 78 transitions, 599 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:08,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:08,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:30:08,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:09,755 INFO L124 PetriNetUnfolderBase]: 1550/2483 cut-off events. [2024-06-28 04:30:09,755 INFO L125 PetriNetUnfolderBase]: For 31042/31042 co-relation queries the response was YES. [2024-06-28 04:30:09,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11435 conditions, 2483 events. 1550/2483 cut-off events. For 31042/31042 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13033 event pairs, 517 based on Foata normal form. 2/2481 useless extension candidates. Maximal degree in co-relation 11398. Up to 2302 conditions per place. [2024-06-28 04:30:09,768 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 88 selfloop transitions, 26 changer transitions 0/119 dead transitions. [2024-06-28 04:30:09,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 119 transitions, 1113 flow [2024-06-28 04:30:09,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:30:09,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:30:09,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-28 04:30:09,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-28 04:30:09,769 INFO L175 Difference]: Start difference. First operand has 88 places, 78 transitions, 599 flow. Second operand 7 states and 121 transitions. [2024-06-28 04:30:09,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 119 transitions, 1113 flow [2024-06-28 04:30:09,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 119 transitions, 1021 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-28 04:30:09,796 INFO L231 Difference]: Finished difference. Result has 92 places, 97 transitions, 744 flow [2024-06-28 04:30:09,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=744, PETRI_PLACES=92, PETRI_TRANSITIONS=97} [2024-06-28 04:30:09,796 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-28 04:30:09,796 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 97 transitions, 744 flow [2024-06-28 04:30:09,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:09,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:09,797 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 04:30:09,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 04:30:09,797 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:09,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:09,797 INFO L85 PathProgramCache]: Analyzing trace with hash -326618759, now seen corresponding path program 2 times [2024-06-28 04:30:09,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:09,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554538509] [2024-06-28 04:30:09,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:09,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:11,442 INFO 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 04:30:11,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:11,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554538509] [2024-06-28 04:30:11,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554538509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:11,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:11,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:30:11,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160534594] [2024-06-28 04:30:11,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:11,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:30:11,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:11,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:30:11,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:30:11,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:30:11,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 97 transitions, 744 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:11,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:11,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:30:11,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:12,365 INFO L124 PetriNetUnfolderBase]: 1572/2520 cut-off events. [2024-06-28 04:30:12,365 INFO L125 PetriNetUnfolderBase]: For 32694/32694 co-relation queries the response was YES. [2024-06-28 04:30:12,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11857 conditions, 2520 events. 1572/2520 cut-off events. For 32694/32694 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13301 event pairs, 522 based on Foata normal form. 2/2521 useless extension candidates. Maximal degree in co-relation 11816. Up to 2319 conditions per place. [2024-06-28 04:30:12,376 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 93 selfloop transitions, 37 changer transitions 0/135 dead transitions. [2024-06-28 04:30:12,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 135 transitions, 1225 flow [2024-06-28 04:30:12,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:30:12,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:30:12,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-28 04:30:12,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-28 04:30:12,379 INFO L175 Difference]: Start difference. First operand has 92 places, 97 transitions, 744 flow. Second operand 7 states and 128 transitions. [2024-06-28 04:30:12,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 135 transitions, 1225 flow [2024-06-28 04:30:12,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 135 transitions, 1189 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-28 04:30:12,400 INFO L231 Difference]: Finished difference. Result has 100 places, 108 transitions, 928 flow [2024-06-28 04:30:12,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=928, PETRI_PLACES=100, PETRI_TRANSITIONS=108} [2024-06-28 04:30:12,406 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-28 04:30:12,406 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 108 transitions, 928 flow [2024-06-28 04:30:12,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:12,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:12,407 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 04:30:12,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 04:30:12,407 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 04:30:12,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:12,409 INFO L85 PathProgramCache]: Analyzing trace with hash 681226938, now seen corresponding path program 4 times [2024-06-28 04:30:12,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:12,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713285630] [2024-06-28 04:30:12,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:12,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:12,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:15,174 INFO 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 04:30:15,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:15,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713285630] [2024-06-28 04:30:15,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713285630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:15,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:15,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:30:15,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259632337] [2024-06-28 04:30:15,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:15,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:30:15,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:15,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:30:15,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:30:15,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:30:15,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 108 transitions, 928 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:15,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:15,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:30:15,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:16,444 INFO L124 PetriNetUnfolderBase]: 1604/2595 cut-off events. [2024-06-28 04:30:16,444 INFO L125 PetriNetUnfolderBase]: For 38386/38386 co-relation queries the response was YES. [2024-06-28 04:30:16,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12409 conditions, 2595 events. 1604/2595 cut-off events. For 38386/38386 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13809 event pairs, 423 based on Foata normal form. 20/2608 useless extension candidates. Maximal degree in co-relation 12363. Up to 2099 conditions per place. [2024-06-28 04:30:16,458 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 102 selfloop transitions, 38 changer transitions 0/145 dead transitions. [2024-06-28 04:30:16,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 145 transitions, 1348 flow [2024-06-28 04:30:16,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:30:16,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:30:16,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 04:30:16,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-28 04:30:16,460 INFO L175 Difference]: Start difference. First operand has 100 places, 108 transitions, 928 flow. Second operand 8 states and 147 transitions. [2024-06-28 04:30:16,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 145 transitions, 1348 flow [2024-06-28 04:30:16,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 145 transitions, 1310 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-28 04:30:16,483 INFO L231 Difference]: Finished difference. Result has 106 places, 109 transitions, 1005 flow [2024-06-28 04:30:16,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1005, PETRI_PLACES=106, PETRI_TRANSITIONS=109} [2024-06-28 04:30:16,484 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-28 04:30:16,484 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 109 transitions, 1005 flow [2024-06-28 04:30:16,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:16,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:16,484 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 04:30:16,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 04:30:16,485 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 04:30:16,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:16,485 INFO L85 PathProgramCache]: Analyzing trace with hash 49479356, now seen corresponding path program 2 times [2024-06-28 04:30:16,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:16,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599901350] [2024-06-28 04:30:16,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:16,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:16,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:19,560 INFO 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 04:30:19,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:19,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599901350] [2024-06-28 04:30:19,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599901350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:19,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:19,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:30:19,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070454867] [2024-06-28 04:30:19,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:19,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:30:19,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:19,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:30:19,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:30:19,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:30:19,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 109 transitions, 1005 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:19,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:19,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:30:19,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:20,876 INFO L124 PetriNetUnfolderBase]: 1652/2691 cut-off events. [2024-06-28 04:30:20,877 INFO L125 PetriNetUnfolderBase]: For 42202/42202 co-relation queries the response was YES. [2024-06-28 04:30:20,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13098 conditions, 2691 events. 1652/2691 cut-off events. For 42202/42202 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 14574 event pairs, 423 based on Foata normal form. 12/2696 useless extension candidates. Maximal degree in co-relation 13050. Up to 2077 conditions per place. [2024-06-28 04:30:20,892 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 103 selfloop transitions, 40 changer transitions 0/148 dead transitions. [2024-06-28 04:30:20,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 148 transitions, 1445 flow [2024-06-28 04:30:20,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:30:20,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:30:20,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 04:30:20,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-28 04:30:20,895 INFO L175 Difference]: Start difference. First operand has 106 places, 109 transitions, 1005 flow. Second operand 8 states and 149 transitions. [2024-06-28 04:30:20,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 148 transitions, 1445 flow [2024-06-28 04:30:20,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 148 transitions, 1354 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-28 04:30:20,938 INFO L231 Difference]: Finished difference. Result has 108 places, 110 transitions, 1034 flow [2024-06-28 04:30:20,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1034, PETRI_PLACES=108, PETRI_TRANSITIONS=110} [2024-06-28 04:30:20,938 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-28 04:30:20,939 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 110 transitions, 1034 flow [2024-06-28 04:30:20,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:20,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:20,939 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 04:30:20,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 04:30:20,939 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 04:30:20,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:20,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1368275784, now seen corresponding path program 3 times [2024-06-28 04:30:20,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:20,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622428181] [2024-06-28 04:30:20,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:20,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:20,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:24,410 INFO 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 04:30:24,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:24,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622428181] [2024-06-28 04:30:24,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622428181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:24,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:24,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:30:24,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877927002] [2024-06-28 04:30:24,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:24,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:30:24,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:24,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:30:24,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:30:24,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:30:24,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 110 transitions, 1034 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:24,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:24,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:30:24,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:25,569 INFO L124 PetriNetUnfolderBase]: 1632/2647 cut-off events. [2024-06-28 04:30:25,570 INFO L125 PetriNetUnfolderBase]: For 41769/41769 co-relation queries the response was YES. [2024-06-28 04:30:25,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12683 conditions, 2647 events. 1632/2647 cut-off events. For 41769/41769 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14187 event pairs, 305 based on Foata normal form. 12/2652 useless extension candidates. Maximal degree in co-relation 12634. Up to 1513 conditions per place. [2024-06-28 04:30:25,582 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 95 selfloop transitions, 47 changer transitions 0/147 dead transitions. [2024-06-28 04:30:25,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 147 transitions, 1400 flow [2024-06-28 04:30:25,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:30:25,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:30:25,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 04:30:25,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-28 04:30:25,584 INFO L175 Difference]: Start difference. First operand has 108 places, 110 transitions, 1034 flow. Second operand 8 states and 147 transitions. [2024-06-28 04:30:25,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 147 transitions, 1400 flow [2024-06-28 04:30:25,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 147 transitions, 1298 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 04:30:25,615 INFO L231 Difference]: Finished difference. Result has 109 places, 109 transitions, 990 flow [2024-06-28 04:30:25,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=892, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=990, PETRI_PLACES=109, PETRI_TRANSITIONS=109} [2024-06-28 04:30:25,615 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-28 04:30:25,615 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 109 transitions, 990 flow [2024-06-28 04:30:25,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:25,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:25,616 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 04:30:25,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 04:30:25,616 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:25,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:25,617 INFO L85 PathProgramCache]: Analyzing trace with hash -429897577, now seen corresponding path program 3 times [2024-06-28 04:30:25,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:25,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090415046] [2024-06-28 04:30:25,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:25,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:25,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:27,747 INFO 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 04:30:27,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:27,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090415046] [2024-06-28 04:30:27,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090415046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:27,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:27,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:30:27,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017187861] [2024-06-28 04:30:27,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:27,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:30:27,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:27,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:30:27,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:30:27,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:30:27,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 109 transitions, 990 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 04:30:27,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:27,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:30:27,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:28,715 INFO L124 PetriNetUnfolderBase]: 1626/2627 cut-off events. [2024-06-28 04:30:28,716 INFO L125 PetriNetUnfolderBase]: For 41255/41255 co-relation queries the response was YES. [2024-06-28 04:30:28,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12658 conditions, 2627 events. 1626/2627 cut-off events. For 41255/41255 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14120 event pairs, 549 based on Foata normal form. 2/2622 useless extension candidates. Maximal degree in co-relation 12608. Up to 2426 conditions per place. [2024-06-28 04:30:28,731 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 81 selfloop transitions, 35 changer transitions 0/121 dead transitions. [2024-06-28 04:30:28,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 121 transitions, 1268 flow [2024-06-28 04:30:28,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:30:28,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:30:28,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-28 04:30:28,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-28 04:30:28,733 INFO L175 Difference]: Start difference. First operand has 109 places, 109 transitions, 990 flow. Second operand 6 states and 100 transitions. [2024-06-28 04:30:28,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 121 transitions, 1268 flow [2024-06-28 04:30:28,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 121 transitions, 1126 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-28 04:30:28,764 INFO L231 Difference]: Finished difference. Result has 108 places, 109 transitions, 924 flow [2024-06-28 04:30:28,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=848, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=924, PETRI_PLACES=108, PETRI_TRANSITIONS=109} [2024-06-28 04:30:28,765 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-28 04:30:28,765 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 109 transitions, 924 flow [2024-06-28 04:30:28,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 04:30:28,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:28,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:28,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 04:30:28,765 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:28,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:28,766 INFO L85 PathProgramCache]: Analyzing trace with hash -423552683, now seen corresponding path program 1 times [2024-06-28 04:30:28,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:28,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660659231] [2024-06-28 04:30:28,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:28,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:30,586 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 04:30:30,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:30,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660659231] [2024-06-28 04:30:30,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660659231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:30,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:30,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:30:30,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885019087] [2024-06-28 04:30:30,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:30,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:30:30,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:30,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:30:30,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:30:30,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:30:30,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 109 transitions, 924 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:30,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:30,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:30:30,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:31,553 INFO L124 PetriNetUnfolderBase]: 1589/2635 cut-off events. [2024-06-28 04:30:31,553 INFO L125 PetriNetUnfolderBase]: For 41261/41263 co-relation queries the response was YES. [2024-06-28 04:30:31,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12148 conditions, 2635 events. 1589/2635 cut-off events. For 41261/41263 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14886 event pairs, 762 based on Foata normal form. 4/2606 useless extension candidates. Maximal degree in co-relation 12098. Up to 2390 conditions per place. [2024-06-28 04:30:31,567 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 105 selfloop transitions, 19 changer transitions 0/135 dead transitions. [2024-06-28 04:30:31,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 135 transitions, 1318 flow [2024-06-28 04:30:31,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:30:31,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:30:31,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-28 04:30:31,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 04:30:31,569 INFO L175 Difference]: Start difference. First operand has 108 places, 109 transitions, 924 flow. Second operand 6 states and 112 transitions. [2024-06-28 04:30:31,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 135 transitions, 1318 flow [2024-06-28 04:30:31,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 135 transitions, 1265 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-28 04:30:31,616 INFO L231 Difference]: Finished difference. Result has 111 places, 115 transitions, 969 flow [2024-06-28 04:30:31,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=969, PETRI_PLACES=111, PETRI_TRANSITIONS=115} [2024-06-28 04:30:31,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-28 04:30:31,617 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 115 transitions, 969 flow [2024-06-28 04:30:31,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:31,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:31,617 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 04:30:31,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 04:30:31,617 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:31,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:31,618 INFO L85 PathProgramCache]: Analyzing trace with hash -231382422, now seen corresponding path program 1 times [2024-06-28 04:30:31,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:31,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725896751] [2024-06-28 04:30:31,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:31,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:31,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:33,916 INFO 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 04:30:33,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:33,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725896751] [2024-06-28 04:30:33,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725896751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:33,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:33,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:30:33,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289526308] [2024-06-28 04:30:33,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:33,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:30:33,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:33,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:30:33,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:30:33,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:30:33,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 115 transitions, 969 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:33,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:33,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:30:33,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:35,095 INFO L124 PetriNetUnfolderBase]: 1676/2717 cut-off events. [2024-06-28 04:30:35,095 INFO L125 PetriNetUnfolderBase]: For 46279/46279 co-relation queries the response was YES. [2024-06-28 04:30:35,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13050 conditions, 2717 events. 1676/2717 cut-off events. For 46279/46279 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14749 event pairs, 544 based on Foata normal form. 4/2720 useless extension candidates. Maximal degree in co-relation 12999. Up to 2438 conditions per place. [2024-06-28 04:30:35,114 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 98 selfloop transitions, 43 changer transitions 0/146 dead transitions. [2024-06-28 04:30:35,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 146 transitions, 1443 flow [2024-06-28 04:30:35,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:30:35,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:30:35,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-28 04:30:35,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 04:30:35,116 INFO L175 Difference]: Start difference. First operand has 111 places, 115 transitions, 969 flow. Second operand 7 states and 126 transitions. [2024-06-28 04:30:35,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 146 transitions, 1443 flow [2024-06-28 04:30:35,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 146 transitions, 1414 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-28 04:30:35,158 INFO L231 Difference]: Finished difference. Result has 116 places, 121 transitions, 1096 flow [2024-06-28 04:30:35,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=940, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1096, PETRI_PLACES=116, PETRI_TRANSITIONS=121} [2024-06-28 04:30:35,158 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-28 04:30:35,159 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 121 transitions, 1096 flow [2024-06-28 04:30:35,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:35,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:35,159 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 04:30:35,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 04:30:35,159 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:35,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:35,160 INFO L85 PathProgramCache]: Analyzing trace with hash 411484087, now seen corresponding path program 2 times [2024-06-28 04:30:35,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:35,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107723794] [2024-06-28 04:30:35,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:35,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:35,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:37,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:37,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:37,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107723794] [2024-06-28 04:30:37,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107723794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:37,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:37,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:30:37,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65377281] [2024-06-28 04:30:37,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:37,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:30:37,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:37,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:30:37,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:30:37,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:30:37,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 121 transitions, 1096 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:37,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:37,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:30:37,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:37,983 INFO L124 PetriNetUnfolderBase]: 1593/2633 cut-off events. [2024-06-28 04:30:37,983 INFO L125 PetriNetUnfolderBase]: For 46544/46544 co-relation queries the response was YES. [2024-06-28 04:30:37,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12886 conditions, 2633 events. 1593/2633 cut-off events. For 46544/46544 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 14819 event pairs, 789 based on Foata normal form. 4/2609 useless extension candidates. Maximal degree in co-relation 12833. Up to 2442 conditions per place. [2024-06-28 04:30:37,999 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 109 selfloop transitions, 14 changer transitions 0/134 dead transitions. [2024-06-28 04:30:37,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 134 transitions, 1374 flow [2024-06-28 04:30:38,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:30:38,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:30:38,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-28 04:30:38,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-28 04:30:38,001 INFO L175 Difference]: Start difference. First operand has 116 places, 121 transitions, 1096 flow. Second operand 6 states and 103 transitions. [2024-06-28 04:30:38,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 134 transitions, 1374 flow [2024-06-28 04:30:38,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 134 transitions, 1314 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-28 04:30:38,044 INFO L231 Difference]: Finished difference. Result has 119 places, 121 transitions, 1071 flow [2024-06-28 04:30:38,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1036, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1071, PETRI_PLACES=119, PETRI_TRANSITIONS=121} [2024-06-28 04:30:38,044 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-28 04:30:38,045 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 121 transitions, 1071 flow [2024-06-28 04:30:38,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:38,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:38,045 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 04:30:38,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 04:30:38,045 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:38,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:38,046 INFO L85 PathProgramCache]: Analyzing trace with hash -960278030, now seen corresponding path program 2 times [2024-06-28 04:30:38,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:38,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356120559] [2024-06-28 04:30:38,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:38,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:38,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:40,192 INFO 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 04:30:40,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:40,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356120559] [2024-06-28 04:30:40,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356120559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:40,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:40,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:30:40,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924084762] [2024-06-28 04:30:40,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:40,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:30:40,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:40,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:30:40,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:30:40,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:30:40,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 121 transitions, 1071 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:40,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:40,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:30:40,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:41,201 INFO L124 PetriNetUnfolderBase]: 1678/2721 cut-off events. [2024-06-28 04:30:41,201 INFO L125 PetriNetUnfolderBase]: For 51371/51371 co-relation queries the response was YES. [2024-06-28 04:30:41,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13487 conditions, 2721 events. 1678/2721 cut-off events. For 51371/51371 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 14769 event pairs, 538 based on Foata normal form. 4/2718 useless extension candidates. Maximal degree in co-relation 13432. Up to 2430 conditions per place. [2024-06-28 04:30:41,218 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 94 selfloop transitions, 43 changer transitions 0/142 dead transitions. [2024-06-28 04:30:41,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 142 transitions, 1497 flow [2024-06-28 04:30:41,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:30:41,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:30:41,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-28 04:30:41,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 04:30:41,219 INFO L175 Difference]: Start difference. First operand has 119 places, 121 transitions, 1071 flow. Second operand 7 states and 119 transitions. [2024-06-28 04:30:41,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 142 transitions, 1497 flow [2024-06-28 04:30:41,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 142 transitions, 1457 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 04:30:41,257 INFO L231 Difference]: Finished difference. Result has 121 places, 124 transitions, 1155 flow [2024-06-28 04:30:41,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1031, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1155, PETRI_PLACES=121, PETRI_TRANSITIONS=124} [2024-06-28 04:30:41,261 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-28 04:30:41,261 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 124 transitions, 1155 flow [2024-06-28 04:30:41,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:41,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:41,262 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 04:30:41,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 04:30:41,262 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 04:30:41,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:41,263 INFO L85 PathProgramCache]: Analyzing trace with hash -97823534, now seen corresponding path program 3 times [2024-06-28 04:30:41,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:41,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839738528] [2024-06-28 04:30:41,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:41,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:43,788 INFO 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 04:30:43,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:43,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839738528] [2024-06-28 04:30:43,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839738528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:43,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:43,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:30:43,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673056945] [2024-06-28 04:30:43,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:43,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:30:43,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:43,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:30:43,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:30:43,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:30:43,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 124 transitions, 1155 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:43,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:43,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:30:43,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:44,883 INFO L124 PetriNetUnfolderBase]: 1666/2724 cut-off events. [2024-06-28 04:30:44,883 INFO L125 PetriNetUnfolderBase]: For 53979/53979 co-relation queries the response was YES. [2024-06-28 04:30:44,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13521 conditions, 2724 events. 1666/2724 cut-off events. For 53979/53979 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 15087 event pairs, 852 based on Foata normal form. 4/2727 useless extension candidates. Maximal degree in co-relation 13465. Up to 2562 conditions per place. [2024-06-28 04:30:44,900 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 118 selfloop transitions, 15 changer transitions 0/138 dead transitions. [2024-06-28 04:30:44,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 138 transitions, 1463 flow [2024-06-28 04:30:44,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:30:44,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:30:44,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-28 04:30:44,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-28 04:30:44,902 INFO L175 Difference]: Start difference. First operand has 121 places, 124 transitions, 1155 flow. Second operand 7 states and 110 transitions. [2024-06-28 04:30:44,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 138 transitions, 1463 flow [2024-06-28 04:30:44,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 138 transitions, 1325 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-28 04:30:44,944 INFO L231 Difference]: Finished difference. Result has 123 places, 124 transitions, 1053 flow [2024-06-28 04:30:44,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1053, PETRI_PLACES=123, PETRI_TRANSITIONS=124} [2024-06-28 04:30:44,945 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-28 04:30:44,945 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 124 transitions, 1053 flow [2024-06-28 04:30:44,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:44,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:44,945 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 04:30:44,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 04:30:44,945 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:44,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:44,946 INFO L85 PathProgramCache]: Analyzing trace with hash -959847440, now seen corresponding path program 1 times [2024-06-28 04:30:44,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:44,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40868713] [2024-06-28 04:30:44,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:44,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:44,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:48,184 INFO 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 04:30:48,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:48,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40868713] [2024-06-28 04:30:48,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40868713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:48,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:48,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:30:48,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180130745] [2024-06-28 04:30:48,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:48,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:30:48,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:48,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:30:48,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:30:48,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:30:48,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 124 transitions, 1053 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:48,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:48,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:30:48,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:49,121 INFO L124 PetriNetUnfolderBase]: 1661/2717 cut-off events. [2024-06-28 04:30:49,121 INFO L125 PetriNetUnfolderBase]: For 54684/54684 co-relation queries the response was YES. [2024-06-28 04:30:49,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13326 conditions, 2717 events. 1661/2717 cut-off events. For 54684/54684 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 15014 event pairs, 851 based on Foata normal form. 2/2718 useless extension candidates. Maximal degree in co-relation 13269. Up to 2565 conditions per place. [2024-06-28 04:30:49,136 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 120 selfloop transitions, 14 changer transitions 0/139 dead transitions. [2024-06-28 04:30:49,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 139 transitions, 1379 flow [2024-06-28 04:30:49,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:30:49,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:30:49,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-28 04:30:49,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-28 04:30:49,138 INFO L175 Difference]: Start difference. First operand has 123 places, 124 transitions, 1053 flow. Second operand 7 states and 108 transitions. [2024-06-28 04:30:49,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 139 transitions, 1379 flow [2024-06-28 04:30:49,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 139 transitions, 1313 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-28 04:30:49,184 INFO L231 Difference]: Finished difference. Result has 123 places, 126 transitions, 1050 flow [2024-06-28 04:30:49,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=987, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1050, PETRI_PLACES=123, PETRI_TRANSITIONS=126} [2024-06-28 04:30:49,184 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-28 04:30:49,185 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 126 transitions, 1050 flow [2024-06-28 04:30:49,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:49,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:49,185 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 04:30:49,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 04:30:49,185 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:49,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:49,186 INFO L85 PathProgramCache]: Analyzing trace with hash 535576546, now seen corresponding path program 1 times [2024-06-28 04:30:49,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:49,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111105662] [2024-06-28 04:30:49,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:49,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:49,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:51,134 INFO 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 04:30:51,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:51,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111105662] [2024-06-28 04:30:51,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111105662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:51,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:51,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:30:51,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559415163] [2024-06-28 04:30:51,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:51,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:30:51,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:51,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:30:51,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:30:51,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:30:51,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 126 transitions, 1050 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:51,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:51,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:30:51,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:52,240 INFO L124 PetriNetUnfolderBase]: 1765/2879 cut-off events. [2024-06-28 04:30:52,240 INFO L125 PetriNetUnfolderBase]: For 59321/59323 co-relation queries the response was YES. [2024-06-28 04:30:52,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14224 conditions, 2879 events. 1765/2879 cut-off events. For 59321/59323 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15817 event pairs, 470 based on Foata normal form. 4/2882 useless extension candidates. Maximal degree in co-relation 14167. Up to 2491 conditions per place. [2024-06-28 04:30:52,259 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 144 selfloop transitions, 50 changer transitions 0/199 dead transitions. [2024-06-28 04:30:52,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 199 transitions, 1989 flow [2024-06-28 04:30:52,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:30:52,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:30:52,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 04:30:52,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 04:30:52,261 INFO L175 Difference]: Start difference. First operand has 123 places, 126 transitions, 1050 flow. Second operand 8 states and 152 transitions. [2024-06-28 04:30:52,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 199 transitions, 1989 flow [2024-06-28 04:30:52,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 199 transitions, 1942 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 04:30:52,310 INFO L231 Difference]: Finished difference. Result has 130 places, 159 transitions, 1449 flow [2024-06-28 04:30:52,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1449, PETRI_PLACES=130, PETRI_TRANSITIONS=159} [2024-06-28 04:30:52,311 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-28 04:30:52,311 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 159 transitions, 1449 flow [2024-06-28 04:30:52,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:52,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:52,311 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 04:30:52,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 04:30:52,311 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:52,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:52,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1264499264, now seen corresponding path program 2 times [2024-06-28 04:30:52,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:52,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225687221] [2024-06-28 04:30:52,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:52,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:54,341 INFO 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 04:30:54,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:54,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225687221] [2024-06-28 04:30:54,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225687221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:54,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:54,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:30:54,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907255391] [2024-06-28 04:30:54,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:54,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:30:54,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:54,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:30:54,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:30:54,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:30:54,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 159 transitions, 1449 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:54,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:54,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:30:54,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:55,207 INFO L124 PetriNetUnfolderBase]: 1769/2861 cut-off events. [2024-06-28 04:30:55,207 INFO L125 PetriNetUnfolderBase]: For 64438/64438 co-relation queries the response was YES. [2024-06-28 04:30:55,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15053 conditions, 2861 events. 1769/2861 cut-off events. For 64438/64438 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15628 event pairs, 542 based on Foata normal form. 4/2864 useless extension candidates. Maximal degree in co-relation 14991. Up to 2615 conditions per place. [2024-06-28 04:30:55,228 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 134 selfloop transitions, 50 changer transitions 0/189 dead transitions. [2024-06-28 04:30:55,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 189 transitions, 1945 flow [2024-06-28 04:30:55,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:30:55,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:30:55,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-28 04:30:55,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 04:30:55,230 INFO L175 Difference]: Start difference. First operand has 130 places, 159 transitions, 1449 flow. Second operand 8 states and 140 transitions. [2024-06-28 04:30:55,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 189 transitions, 1945 flow [2024-06-28 04:30:55,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 189 transitions, 1905 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-06-28 04:30:55,293 INFO L231 Difference]: Finished difference. Result has 137 places, 162 transitions, 1559 flow [2024-06-28 04:30:55,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1559, PETRI_PLACES=137, PETRI_TRANSITIONS=162} [2024-06-28 04:30:55,293 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-28 04:30:55,294 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 162 transitions, 1559 flow [2024-06-28 04:30:55,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:55,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:55,294 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 04:30:55,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 04:30:55,294 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 04:30:55,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:55,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1134923884, now seen corresponding path program 3 times [2024-06-28 04:30:55,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:55,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846325138] [2024-06-28 04:30:55,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:55,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:57,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:57,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:57,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846325138] [2024-06-28 04:30:57,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846325138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:57,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:57,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:30:57,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259642931] [2024-06-28 04:30:57,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:57,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:30:57,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:57,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:30:57,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:30:57,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:30:57,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 162 transitions, 1559 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:57,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:57,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:30:57,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:58,701 INFO L124 PetriNetUnfolderBase]: 1805/2931 cut-off events. [2024-06-28 04:30:58,701 INFO L125 PetriNetUnfolderBase]: For 70377/70379 co-relation queries the response was YES. [2024-06-28 04:30:58,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15931 conditions, 2931 events. 1805/2931 cut-off events. For 70377/70379 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16088 event pairs, 471 based on Foata normal form. 6/2936 useless extension candidates. Maximal degree in co-relation 15866. Up to 2535 conditions per place. [2024-06-28 04:30:58,718 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 137 selfloop transitions, 60 changer transitions 0/202 dead transitions. [2024-06-28 04:30:58,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 202 transitions, 2288 flow [2024-06-28 04:30:58,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:30:58,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:30:58,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-28 04:30:58,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-28 04:30:58,720 INFO L175 Difference]: Start difference. First operand has 137 places, 162 transitions, 1559 flow. Second operand 7 states and 130 transitions. [2024-06-28 04:30:58,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 202 transitions, 2288 flow [2024-06-28 04:30:58,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 202 transitions, 2166 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-28 04:30:58,787 INFO L231 Difference]: Finished difference. Result has 139 places, 173 transitions, 1725 flow [2024-06-28 04:30:58,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1441, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1725, PETRI_PLACES=139, PETRI_TRANSITIONS=173} [2024-06-28 04:30:58,788 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-28 04:30:58,788 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 173 transitions, 1725 flow [2024-06-28 04:30:58,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:58,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:58,788 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 04:30:58,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 04:30:58,789 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 04:30:58,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:58,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1130162284, now seen corresponding path program 4 times [2024-06-28 04:30:58,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:58,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355294326] [2024-06-28 04:30:58,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:58,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:58,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:01,105 INFO 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 04:31:01,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:01,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355294326] [2024-06-28 04:31:01,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355294326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:01,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:01,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:31:01,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015191427] [2024-06-28 04:31:01,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:01,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:31:01,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:01,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:31:01,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:31:01,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:31:01,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 173 transitions, 1725 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:01,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:01,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:31:01,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:02,100 INFO L124 PetriNetUnfolderBase]: 1825/2943 cut-off events. [2024-06-28 04:31:02,100 INFO L125 PetriNetUnfolderBase]: For 74887/74887 co-relation queries the response was YES. [2024-06-28 04:31:02,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16456 conditions, 2943 events. 1825/2943 cut-off events. For 74887/74887 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 16116 event pairs, 551 based on Foata normal form. 4/2946 useless extension candidates. Maximal degree in co-relation 16389. Up to 2681 conditions per place. [2024-06-28 04:31:02,121 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 140 selfloop transitions, 56 changer transitions 0/201 dead transitions. [2024-06-28 04:31:02,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 201 transitions, 2296 flow [2024-06-28 04:31:02,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:31:02,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:31:02,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-28 04:31:02,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-28 04:31:02,123 INFO L175 Difference]: Start difference. First operand has 139 places, 173 transitions, 1725 flow. Second operand 7 states and 121 transitions. [2024-06-28 04:31:02,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 201 transitions, 2296 flow [2024-06-28 04:31:02,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 201 transitions, 2186 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-28 04:31:02,189 INFO L231 Difference]: Finished difference. Result has 142 places, 179 transitions, 1839 flow [2024-06-28 04:31:02,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1623, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1839, PETRI_PLACES=142, PETRI_TRANSITIONS=179} [2024-06-28 04:31:02,190 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-28 04:31:02,190 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 179 transitions, 1839 flow [2024-06-28 04:31:02,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:02,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:02,190 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 04:31:02,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 04:31:02,190 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 04:31:02,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:02,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1584802212, now seen corresponding path program 5 times [2024-06-28 04:31:02,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:02,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420787582] [2024-06-28 04:31:02,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:02,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:02,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:04,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:04,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:04,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420787582] [2024-06-28 04:31:04,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420787582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:04,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:04,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:31:04,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910882806] [2024-06-28 04:31:04,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:04,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:31:04,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:04,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:31:04,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:31:04,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:31:04,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 179 transitions, 1839 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:04,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:04,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:31:04,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:05,565 INFO L124 PetriNetUnfolderBase]: 1829/2963 cut-off events. [2024-06-28 04:31:05,566 INFO L125 PetriNetUnfolderBase]: For 75313/75313 co-relation queries the response was YES. [2024-06-28 04:31:05,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16664 conditions, 2963 events. 1829/2963 cut-off events. For 75313/75313 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16263 event pairs, 472 based on Foata normal form. 4/2963 useless extension candidates. Maximal degree in co-relation 16597. Up to 2564 conditions per place. [2024-06-28 04:31:05,584 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 135 selfloop transitions, 68 changer transitions 0/208 dead transitions. [2024-06-28 04:31:05,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 208 transitions, 2516 flow [2024-06-28 04:31:05,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:31:05,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:31:05,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 04:31:05,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-28 04:31:05,586 INFO L175 Difference]: Start difference. First operand has 142 places, 179 transitions, 1839 flow. Second operand 8 states and 135 transitions. [2024-06-28 04:31:05,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 208 transitions, 2516 flow [2024-06-28 04:31:05,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 208 transitions, 2356 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-28 04:31:05,650 INFO L231 Difference]: Finished difference. Result has 145 places, 184 transitions, 1897 flow [2024-06-28 04:31:05,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1689, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1897, PETRI_PLACES=145, PETRI_TRANSITIONS=184} [2024-06-28 04:31:05,651 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-28 04:31:05,651 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 184 transitions, 1897 flow [2024-06-28 04:31:05,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:05,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:05,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:05,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 04:31:05,652 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 04:31:05,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:05,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1585130502, now seen corresponding path program 6 times [2024-06-28 04:31:05,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:05,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097494703] [2024-06-28 04:31:05,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:05,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:05,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:07,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:07,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:07,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097494703] [2024-06-28 04:31:07,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097494703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:07,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:07,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:31:07,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003027511] [2024-06-28 04:31:07,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:07,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:31:07,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:07,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:31:07,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:31:07,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:31:07,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 184 transitions, 1897 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:07,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:07,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:31:07,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:09,065 INFO L124 PetriNetUnfolderBase]: 1839/2975 cut-off events. [2024-06-28 04:31:09,066 INFO L125 PetriNetUnfolderBase]: For 73578/73578 co-relation queries the response was YES. [2024-06-28 04:31:09,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16532 conditions, 2975 events. 1839/2975 cut-off events. For 73578/73578 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 16284 event pairs, 475 based on Foata normal form. 2/2973 useless extension candidates. Maximal degree in co-relation 16464. Up to 2574 conditions per place. [2024-06-28 04:31:09,087 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 131 selfloop transitions, 71 changer transitions 0/207 dead transitions. [2024-06-28 04:31:09,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 207 transitions, 2473 flow [2024-06-28 04:31:09,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:31:09,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:31:09,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-28 04:31:09,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-28 04:31:09,089 INFO L175 Difference]: Start difference. First operand has 145 places, 184 transitions, 1897 flow. Second operand 7 states and 120 transitions. [2024-06-28 04:31:09,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 207 transitions, 2473 flow [2024-06-28 04:31:09,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 207 transitions, 2371 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-28 04:31:09,172 INFO L231 Difference]: Finished difference. Result has 149 places, 188 transitions, 1997 flow [2024-06-28 04:31:09,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1803, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1997, PETRI_PLACES=149, PETRI_TRANSITIONS=188} [2024-06-28 04:31:09,172 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-28 04:31:09,173 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 188 transitions, 1997 flow [2024-06-28 04:31:09,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:09,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:09,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:09,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 04:31:09,173 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 04:31:09,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:09,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1701287106, now seen corresponding path program 7 times [2024-06-28 04:31:09,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:09,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491365514] [2024-06-28 04:31:09,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:09,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:09,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:11,523 INFO 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 04:31:11,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:11,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491365514] [2024-06-28 04:31:11,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491365514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:11,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:11,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:31:11,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230844617] [2024-06-28 04:31:11,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:11,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:31:11,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:11,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:31:11,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:31:11,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:31:11,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 188 transitions, 1997 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:11,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:11,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:31:11,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:12,746 INFO L124 PetriNetUnfolderBase]: 1843/2969 cut-off events. [2024-06-28 04:31:12,747 INFO L125 PetriNetUnfolderBase]: For 78380/78380 co-relation queries the response was YES. [2024-06-28 04:31:12,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16593 conditions, 2969 events. 1843/2969 cut-off events. For 78380/78380 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16255 event pairs, 561 based on Foata normal form. 4/2966 useless extension candidates. Maximal degree in co-relation 16524. Up to 2678 conditions per place. [2024-06-28 04:31:12,766 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 137 selfloop transitions, 67 changer transitions 0/209 dead transitions. [2024-06-28 04:31:12,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 209 transitions, 2565 flow [2024-06-28 04:31:12,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:31:12,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:31:12,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-28 04:31:12,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-28 04:31:12,784 INFO L175 Difference]: Start difference. First operand has 149 places, 188 transitions, 1997 flow. Second operand 9 states and 143 transitions. [2024-06-28 04:31:12,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 209 transitions, 2565 flow [2024-06-28 04:31:12,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 209 transitions, 2459 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-28 04:31:12,871 INFO L231 Difference]: Finished difference. Result has 155 places, 191 transitions, 2081 flow [2024-06-28 04:31:12,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1893, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2081, PETRI_PLACES=155, PETRI_TRANSITIONS=191} [2024-06-28 04:31:12,872 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-28 04:31:12,872 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 191 transitions, 2081 flow [2024-06-28 04:31:12,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:12,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:12,873 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 04:31:12,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 04:31:12,873 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 04:31:12,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:12,874 INFO L85 PathProgramCache]: Analyzing trace with hash -958386634, now seen corresponding path program 8 times [2024-06-28 04:31:12,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:12,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442945177] [2024-06-28 04:31:12,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:12,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:15,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:15,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:15,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442945177] [2024-06-28 04:31:15,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442945177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:15,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:15,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:31:15,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835889365] [2024-06-28 04:31:15,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:15,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:31:15,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:15,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:31:15,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:31:15,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:31:15,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 191 transitions, 2081 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:15,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:15,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:31:15,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:16,119 INFO L124 PetriNetUnfolderBase]: 1837/2957 cut-off events. [2024-06-28 04:31:16,120 INFO L125 PetriNetUnfolderBase]: For 80662/80662 co-relation queries the response was YES. [2024-06-28 04:31:16,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16827 conditions, 2957 events. 1837/2957 cut-off events. For 80662/80662 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16126 event pairs, 561 based on Foata normal form. 2/2952 useless extension candidates. Maximal degree in co-relation 16757. Up to 2673 conditions per place. [2024-06-28 04:31:16,142 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 130 selfloop transitions, 69 changer transitions 0/204 dead transitions. [2024-06-28 04:31:16,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 204 transitions, 2513 flow [2024-06-28 04:31:16,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:31:16,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:31:16,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-28 04:31:16,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-28 04:31:16,143 INFO L175 Difference]: Start difference. First operand has 155 places, 191 transitions, 2081 flow. Second operand 8 states and 126 transitions. [2024-06-28 04:31:16,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 204 transitions, 2513 flow [2024-06-28 04:31:16,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 204 transitions, 2343 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-28 04:31:16,212 INFO L231 Difference]: Finished difference. Result has 157 places, 191 transitions, 2055 flow [2024-06-28 04:31:16,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1911, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2055, PETRI_PLACES=157, PETRI_TRANSITIONS=191} [2024-06-28 04:31:16,213 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-28 04:31:16,213 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 191 transitions, 2055 flow [2024-06-28 04:31:16,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:16,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:16,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:16,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 04:31:16,214 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 04:31:16,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:16,214 INFO L85 PathProgramCache]: Analyzing trace with hash 2087983584, now seen corresponding path program 1 times [2024-06-28 04:31:16,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:16,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504357375] [2024-06-28 04:31:16,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:16,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:16,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:18,926 INFO 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 04:31:18,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:18,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504357375] [2024-06-28 04:31:18,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504357375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:18,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:18,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:31:18,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771645167] [2024-06-28 04:31:18,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:18,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:31:18,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:18,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:31:18,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:31:18,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:31:18,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 191 transitions, 2055 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:18,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:18,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:31:18,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:20,172 INFO L124 PetriNetUnfolderBase]: 1873/3067 cut-off events. [2024-06-28 04:31:20,172 INFO L125 PetriNetUnfolderBase]: For 109296/109313 co-relation queries the response was YES. [2024-06-28 04:31:20,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18033 conditions, 3067 events. 1873/3067 cut-off events. For 109296/109313 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 17529 event pairs, 765 based on Foata normal form. 10/3028 useless extension candidates. Maximal degree in co-relation 17962. Up to 2598 conditions per place. [2024-06-28 04:31:20,194 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 170 selfloop transitions, 26 changer transitions 0/226 dead transitions. [2024-06-28 04:31:20,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 226 transitions, 2661 flow [2024-06-28 04:31:20,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:31:20,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:31:20,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-28 04:31:20,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-28 04:31:20,196 INFO L175 Difference]: Start difference. First operand has 157 places, 191 transitions, 2055 flow. Second operand 7 states and 134 transitions. [2024-06-28 04:31:20,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 226 transitions, 2661 flow [2024-06-28 04:31:20,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 226 transitions, 2543 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 04:31:20,308 INFO L231 Difference]: Finished difference. Result has 158 places, 193 transitions, 2023 flow [2024-06-28 04:31:20,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1937, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2023, PETRI_PLACES=158, PETRI_TRANSITIONS=193} [2024-06-28 04:31:20,308 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-28 04:31:20,308 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 193 transitions, 2023 flow [2024-06-28 04:31:20,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:20,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:20,309 INFO 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 04:31:20,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 04:31:20,309 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 04:31:20,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:20,309 INFO L85 PathProgramCache]: Analyzing trace with hash 544772845, now seen corresponding path program 1 times [2024-06-28 04:31:20,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:20,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057933700] [2024-06-28 04:31:20,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:20,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:22,885 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 04:31:22,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:22,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057933700] [2024-06-28 04:31:22,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057933700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:22,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:22,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:31:22,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287473619] [2024-06-28 04:31:22,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:22,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:31:22,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:22,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:31:22,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:31:22,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:31:22,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 193 transitions, 2023 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:22,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:22,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:31:22,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:23,942 INFO L124 PetriNetUnfolderBase]: 2043/3267 cut-off events. [2024-06-28 04:31:23,943 INFO L125 PetriNetUnfolderBase]: For 105251/105251 co-relation queries the response was YES. [2024-06-28 04:31:23,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19036 conditions, 3267 events. 2043/3267 cut-off events. For 105251/105251 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17986 event pairs, 572 based on Foata normal form. 8/3274 useless extension candidates. Maximal degree in co-relation 18964. Up to 2855 conditions per place. [2024-06-28 04:31:23,964 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 168 selfloop transitions, 66 changer transitions 0/239 dead transitions. [2024-06-28 04:31:23,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 239 transitions, 2798 flow [2024-06-28 04:31:23,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:31:23,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:31:23,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 04:31:23,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-28 04:31:23,966 INFO L175 Difference]: Start difference. First operand has 158 places, 193 transitions, 2023 flow. Second operand 9 states and 164 transitions. [2024-06-28 04:31:23,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 239 transitions, 2798 flow [2024-06-28 04:31:24,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 239 transitions, 2764 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 04:31:24,068 INFO L231 Difference]: Finished difference. Result has 165 places, 204 transitions, 2277 flow [2024-06-28 04:31:24,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1989, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2277, PETRI_PLACES=165, PETRI_TRANSITIONS=204} [2024-06-28 04:31:24,068 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-28 04:31:24,069 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 204 transitions, 2277 flow [2024-06-28 04:31:24,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:24,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:24,069 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 04:31:24,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 04:31:24,069 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 04:31:24,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:24,070 INFO L85 PathProgramCache]: Analyzing trace with hash 987686908, now seen corresponding path program 2 times [2024-06-28 04:31:24,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:24,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105851972] [2024-06-28 04:31:24,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:24,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:24,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:26,988 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 04:31:26,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:26,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105851972] [2024-06-28 04:31:26,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105851972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:26,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:26,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:31:26,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944502204] [2024-06-28 04:31:26,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:26,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:31:26,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:26,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:31:26,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:31:27,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:31:27,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 204 transitions, 2277 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:27,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:27,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:31:27,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:28,099 INFO L124 PetriNetUnfolderBase]: 2035/3304 cut-off events. [2024-06-28 04:31:28,099 INFO L125 PetriNetUnfolderBase]: For 133361/133377 co-relation queries the response was YES. [2024-06-28 04:31:28,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20591 conditions, 3304 events. 2035/3304 cut-off events. For 133361/133377 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 18973 event pairs, 828 based on Foata normal form. 14/3270 useless extension candidates. Maximal degree in co-relation 20516. Up to 2921 conditions per place. [2024-06-28 04:31:28,123 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 177 selfloop transitions, 24 changer transitions 0/231 dead transitions. [2024-06-28 04:31:28,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 231 transitions, 2787 flow [2024-06-28 04:31:28,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:31:28,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:31:28,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-28 04:31:28,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-28 04:31:28,125 INFO L175 Difference]: Start difference. First operand has 165 places, 204 transitions, 2277 flow. Second operand 7 states and 128 transitions. [2024-06-28 04:31:28,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 231 transitions, 2787 flow [2024-06-28 04:31:28,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 231 transitions, 2698 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-28 04:31:28,261 INFO L231 Difference]: Finished difference. Result has 169 places, 205 transitions, 2260 flow [2024-06-28 04:31:28,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2188, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2260, PETRI_PLACES=169, PETRI_TRANSITIONS=205} [2024-06-28 04:31:28,262 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-28 04:31:28,262 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 205 transitions, 2260 flow [2024-06-28 04:31:28,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:28,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:28,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:28,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 04:31:28,263 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 04:31:28,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:28,263 INFO L85 PathProgramCache]: Analyzing trace with hash -822900711, now seen corresponding path program 2 times [2024-06-28 04:31:28,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:28,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103966868] [2024-06-28 04:31:28,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:28,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:30,672 INFO 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 04:31:30,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:30,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103966868] [2024-06-28 04:31:30,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103966868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:30,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:30,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:31:30,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330803246] [2024-06-28 04:31:30,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:30,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:31:30,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:30,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:31:30,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:31:30,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:31:30,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 205 transitions, 2260 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:30,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:30,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:31:30,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:32,047 INFO L124 PetriNetUnfolderBase]: 2147/3439 cut-off events. [2024-06-28 04:31:32,047 INFO L125 PetriNetUnfolderBase]: For 118957/118959 co-relation queries the response was YES. [2024-06-28 04:31:32,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20960 conditions, 3439 events. 2147/3439 cut-off events. For 118957/118959 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19099 event pairs, 530 based on Foata normal form. 6/3444 useless extension candidates. Maximal degree in co-relation 20883. Up to 2802 conditions per place. [2024-06-28 04:31:32,077 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 167 selfloop transitions, 89 changer transitions 0/261 dead transitions. [2024-06-28 04:31:32,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 261 transitions, 3253 flow [2024-06-28 04:31:32,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:31:32,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:31:32,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 04:31:32,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-28 04:31:32,081 INFO L175 Difference]: Start difference. First operand has 169 places, 205 transitions, 2260 flow. Second operand 8 states and 150 transitions. [2024-06-28 04:31:32,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 261 transitions, 3253 flow [2024-06-28 04:31:32,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 261 transitions, 3203 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 04:31:32,236 INFO L231 Difference]: Finished difference. Result has 174 places, 226 transitions, 2731 flow [2024-06-28 04:31:32,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2210, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2731, PETRI_PLACES=174, PETRI_TRANSITIONS=226} [2024-06-28 04:31:32,241 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-28 04:31:32,241 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 226 transitions, 2731 flow [2024-06-28 04:31:32,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:32,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:32,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:32,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 04:31:32,241 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 04:31:32,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:32,242 INFO L85 PathProgramCache]: Analyzing trace with hash 299253846, now seen corresponding path program 3 times [2024-06-28 04:31:32,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:32,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12797896] [2024-06-28 04:31:32,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:32,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:32,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:35,230 INFO 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 04:31:35,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:35,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12797896] [2024-06-28 04:31:35,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12797896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:35,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:35,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:31:35,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371256182] [2024-06-28 04:31:35,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:35,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:31:35,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:35,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:31:35,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:31:35,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:31:35,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 226 transitions, 2731 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:35,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:35,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:31:35,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:36,247 INFO L124 PetriNetUnfolderBase]: 2044/3307 cut-off events. [2024-06-28 04:31:36,248 INFO L125 PetriNetUnfolderBase]: For 137919/137935 co-relation queries the response was YES. [2024-06-28 04:31:36,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21272 conditions, 3307 events. 2044/3307 cut-off events. For 137919/137935 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 18921 event pairs, 867 based on Foata normal form. 14/3271 useless extension candidates. Maximal degree in co-relation 21192. Up to 2976 conditions per place. [2024-06-28 04:31:36,272 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 199 selfloop transitions, 17 changer transitions 0/246 dead transitions. [2024-06-28 04:31:36,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 246 transitions, 3241 flow [2024-06-28 04:31:36,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:31:36,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:31:36,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-28 04:31:36,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-28 04:31:36,274 INFO L175 Difference]: Start difference. First operand has 174 places, 226 transitions, 2731 flow. Second operand 7 states and 120 transitions. [2024-06-28 04:31:36,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 246 transitions, 3241 flow [2024-06-28 04:31:36,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 246 transitions, 3154 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-28 04:31:36,428 INFO L231 Difference]: Finished difference. Result has 178 places, 226 transitions, 2684 flow [2024-06-28 04:31:36,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2644, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2684, PETRI_PLACES=178, PETRI_TRANSITIONS=226} [2024-06-28 04:31:36,429 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-28 04:31:36,429 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 226 transitions, 2684 flow [2024-06-28 04:31:36,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:36,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:36,429 INFO 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 04:31:36,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 04:31:36,430 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 04:31:36,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:36,430 INFO L85 PathProgramCache]: Analyzing trace with hash 573401035, now seen corresponding path program 3 times [2024-06-28 04:31:36,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:36,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969910140] [2024-06-28 04:31:36,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:36,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:38,957 INFO 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 04:31:38,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:38,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969910140] [2024-06-28 04:31:38,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969910140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:38,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:38,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:31:38,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225148559] [2024-06-28 04:31:38,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:38,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:31:38,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:38,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:31:38,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:31:38,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:31:38,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 226 transitions, 2684 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:38,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:38,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:31:38,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:40,201 INFO L124 PetriNetUnfolderBase]: 2090/3340 cut-off events. [2024-06-28 04:31:40,201 INFO L125 PetriNetUnfolderBase]: For 115822/115822 co-relation queries the response was YES. [2024-06-28 04:31:40,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20596 conditions, 3340 events. 2090/3340 cut-off events. For 115822/115822 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18469 event pairs, 571 based on Foata normal form. 8/3347 useless extension candidates. Maximal degree in co-relation 20514. Up to 2944 conditions per place. [2024-06-28 04:31:40,232 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 176 selfloop transitions, 82 changer transitions 0/263 dead transitions. [2024-06-28 04:31:40,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 263 transitions, 3324 flow [2024-06-28 04:31:40,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:31:40,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:31:40,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-28 04:31:40,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069264069264069 [2024-06-28 04:31:40,233 INFO L175 Difference]: Start difference. First operand has 178 places, 226 transitions, 2684 flow. Second operand 11 states and 188 transitions. [2024-06-28 04:31:40,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 263 transitions, 3324 flow [2024-06-28 04:31:40,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 263 transitions, 3251 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-28 04:31:40,381 INFO L231 Difference]: Finished difference. Result has 183 places, 226 transitions, 2785 flow [2024-06-28 04:31:40,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2611, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2785, PETRI_PLACES=183, PETRI_TRANSITIONS=226} [2024-06-28 04:31:40,382 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-28 04:31:40,382 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 226 transitions, 2785 flow [2024-06-28 04:31:40,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:40,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:40,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:40,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 04:31:40,383 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 04:31:40,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:40,383 INFO L85 PathProgramCache]: Analyzing trace with hash 576261677, now seen corresponding path program 1 times [2024-06-28 04:31:40,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:40,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520850478] [2024-06-28 04:31:40,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:40,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:43,528 INFO 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 04:31:43,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:43,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520850478] [2024-06-28 04:31:43,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520850478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:43,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:43,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:31:43,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224986477] [2024-06-28 04:31:43,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:43,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:31:43,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:43,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:31:43,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:31:43,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:31:43,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 226 transitions, 2785 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:43,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:43,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:31:43,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:44,822 INFO L124 PetriNetUnfolderBase]: 2134/3408 cut-off events. [2024-06-28 04:31:44,822 INFO L125 PetriNetUnfolderBase]: For 124829/124829 co-relation queries the response was YES. [2024-06-28 04:31:44,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21163 conditions, 3408 events. 2134/3408 cut-off events. For 124829/124829 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 18963 event pairs, 577 based on Foata normal form. 12/3419 useless extension candidates. Maximal degree in co-relation 21080. Up to 3040 conditions per place. [2024-06-28 04:31:44,847 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 193 selfloop transitions, 65 changer transitions 0/263 dead transitions. [2024-06-28 04:31:44,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 263 transitions, 3481 flow [2024-06-28 04:31:44,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:31:44,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:31:44,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-28 04:31:44,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-28 04:31:44,849 INFO L175 Difference]: Start difference. First operand has 183 places, 226 transitions, 2785 flow. Second operand 9 states and 160 transitions. [2024-06-28 04:31:44,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 263 transitions, 3481 flow [2024-06-28 04:31:44,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 263 transitions, 3289 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-28 04:31:45,001 INFO L231 Difference]: Finished difference. Result has 182 places, 227 transitions, 2747 flow [2024-06-28 04:31:45,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2593, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2747, PETRI_PLACES=182, PETRI_TRANSITIONS=227} [2024-06-28 04:31:45,001 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-28 04:31:45,002 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 227 transitions, 2747 flow [2024-06-28 04:31:45,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:45,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:45,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:45,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 04:31:45,002 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 04:31:45,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:45,003 INFO L85 PathProgramCache]: Analyzing trace with hash -675083721, now seen corresponding path program 4 times [2024-06-28 04:31:45,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:45,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488137517] [2024-06-28 04:31:45,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:45,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:47,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:47,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:47,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488137517] [2024-06-28 04:31:47,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488137517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:47,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:47,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:31:47,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230387351] [2024-06-28 04:31:47,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:47,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:31:47,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:47,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:31:47,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:31:47,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:31:47,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 227 transitions, 2747 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:47,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:47,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:31:47,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:49,180 INFO L124 PetriNetUnfolderBase]: 2238/3556 cut-off events. [2024-06-28 04:31:49,181 INFO L125 PetriNetUnfolderBase]: For 135353/135353 co-relation queries the response was YES. [2024-06-28 04:31:49,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22500 conditions, 3556 events. 2238/3556 cut-off events. For 135353/135353 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 19746 event pairs, 575 based on Foata normal form. 8/3563 useless extension candidates. Maximal degree in co-relation 22416. Up to 3064 conditions per place. [2024-06-28 04:31:49,212 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 167 selfloop transitions, 100 changer transitions 0/272 dead transitions. [2024-06-28 04:31:49,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 272 transitions, 3692 flow [2024-06-28 04:31:49,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:31:49,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:31:49,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-28 04:31:49,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 04:31:49,214 INFO L175 Difference]: Start difference. First operand has 182 places, 227 transitions, 2747 flow. Second operand 10 states and 170 transitions. [2024-06-28 04:31:49,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 272 transitions, 3692 flow [2024-06-28 04:31:49,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 272 transitions, 3560 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 04:31:49,354 INFO L231 Difference]: Finished difference. Result has 185 places, 239 transitions, 3047 flow [2024-06-28 04:31:49,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2615, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3047, PETRI_PLACES=185, PETRI_TRANSITIONS=239} [2024-06-28 04:31:49,354 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-28 04:31:49,355 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 239 transitions, 3047 flow [2024-06-28 04:31:49,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:49,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:49,355 INFO 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 04:31:49,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 04:31:49,355 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 04:31:49,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:49,356 INFO L85 PathProgramCache]: Analyzing trace with hash -2136274765, now seen corresponding path program 5 times [2024-06-28 04:31:49,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:49,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716253736] [2024-06-28 04:31:49,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:49,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:49,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:52,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:52,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716253736] [2024-06-28 04:31:52,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716253736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:52,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:52,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:31:52,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756386788] [2024-06-28 04:31:52,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:52,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:31:52,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:52,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:31:52,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:31:52,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:31:52,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 239 transitions, 3047 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:52,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:52,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:31:52,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:53,438 INFO L124 PetriNetUnfolderBase]: 2214/3524 cut-off events. [2024-06-28 04:31:53,439 INFO L125 PetriNetUnfolderBase]: For 135204/135204 co-relation queries the response was YES. [2024-06-28 04:31:53,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22562 conditions, 3524 events. 2214/3524 cut-off events. For 135204/135204 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 19589 event pairs, 571 based on Foata normal form. 8/3531 useless extension candidates. Maximal degree in co-relation 22477. Up to 3048 conditions per place. [2024-06-28 04:31:53,471 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 169 selfloop transitions, 94 changer transitions 0/268 dead transitions. [2024-06-28 04:31:53,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 268 transitions, 3688 flow [2024-06-28 04:31:53,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:31:53,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:31:53,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 04:31:53,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 04:31:53,472 INFO L175 Difference]: Start difference. First operand has 185 places, 239 transitions, 3047 flow. Second operand 8 states and 144 transitions. [2024-06-28 04:31:53,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 268 transitions, 3688 flow [2024-06-28 04:31:53,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 268 transitions, 3451 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-28 04:31:53,672 INFO L231 Difference]: Finished difference. Result has 186 places, 239 transitions, 3016 flow [2024-06-28 04:31:53,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2810, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3016, PETRI_PLACES=186, PETRI_TRANSITIONS=239} [2024-06-28 04:31:53,683 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-28 04:31:53,684 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 239 transitions, 3016 flow [2024-06-28 04:31:53,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:53,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:53,684 INFO 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 04:31:53,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 04:31:53,684 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 04:31:53,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:53,685 INFO L85 PathProgramCache]: Analyzing trace with hash -2136059439, now seen corresponding path program 2 times [2024-06-28 04:31:53,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:53,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567493328] [2024-06-28 04:31:53,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:53,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:53,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:57,148 INFO 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 04:31:57,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:57,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567493328] [2024-06-28 04:31:57,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567493328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:57,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:57,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:31:57,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155023648] [2024-06-28 04:31:57,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:57,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:31:57,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:57,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:31:57,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:31:57,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:31:57,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 239 transitions, 3016 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:57,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:57,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:31:57,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:58,690 INFO L124 PetriNetUnfolderBase]: 2258/3592 cut-off events. [2024-06-28 04:31:58,690 INFO L125 PetriNetUnfolderBase]: For 138602/138602 co-relation queries the response was YES. [2024-06-28 04:31:58,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22955 conditions, 3592 events. 2258/3592 cut-off events. For 138602/138602 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 20081 event pairs, 599 based on Foata normal form. 12/3603 useless extension candidates. Maximal degree in co-relation 22869. Up to 3168 conditions per place. [2024-06-28 04:31:58,724 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 200 selfloop transitions, 66 changer transitions 0/271 dead transitions. [2024-06-28 04:31:58,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 271 transitions, 3731 flow [2024-06-28 04:31:58,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:31:58,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:31:58,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 04:31:58,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-28 04:31:58,726 INFO L175 Difference]: Start difference. First operand has 186 places, 239 transitions, 3016 flow. Second operand 8 states and 141 transitions. [2024-06-28 04:31:58,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 271 transitions, 3731 flow [2024-06-28 04:31:58,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 271 transitions, 3543 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-28 04:31:58,881 INFO L231 Difference]: Finished difference. Result has 187 places, 240 transitions, 2990 flow [2024-06-28 04:31:58,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2828, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2990, PETRI_PLACES=187, PETRI_TRANSITIONS=240} [2024-06-28 04:31:58,881 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-28 04:31:58,881 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 240 transitions, 2990 flow [2024-06-28 04:31:58,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:58,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:58,882 INFO 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 04:31:58,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 04:31:58,882 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 04:31:58,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:58,882 INFO L85 PathProgramCache]: Analyzing trace with hash 202559513, now seen corresponding path program 6 times [2024-06-28 04:31:58,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:58,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929729415] [2024-06-28 04:31:58,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:58,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:01,468 INFO 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 04:32:01,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:01,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929729415] [2024-06-28 04:32:01,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929729415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:01,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:01,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:01,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672269987] [2024-06-28 04:32:01,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:01,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:01,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:01,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:01,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:01,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:32:01,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 240 transitions, 2990 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:01,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:01,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:32:01,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:02,877 INFO L124 PetriNetUnfolderBase]: 2278/3632 cut-off events. [2024-06-28 04:32:02,877 INFO L125 PetriNetUnfolderBase]: For 136514/136514 co-relation queries the response was YES. [2024-06-28 04:32:02,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23234 conditions, 3632 events. 2278/3632 cut-off events. For 136514/136514 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20267 event pairs, 536 based on Foata normal form. 4/3632 useless extension candidates. Maximal degree in co-relation 23147. Up to 2971 conditions per place. [2024-06-28 04:32:02,912 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 173 selfloop transitions, 96 changer transitions 0/274 dead transitions. [2024-06-28 04:32:02,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 274 transitions, 3856 flow [2024-06-28 04:32:02,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:32:02,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:32:02,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 04:32:02,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-28 04:32:02,914 INFO L175 Difference]: Start difference. First operand has 187 places, 240 transitions, 2990 flow. Second operand 8 states and 145 transitions. [2024-06-28 04:32:02,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 274 transitions, 3856 flow [2024-06-28 04:32:03,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 274 transitions, 3718 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 04:32:03,076 INFO L231 Difference]: Finished difference. Result has 189 places, 244 transitions, 3121 flow [2024-06-28 04:32:03,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2856, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3121, PETRI_PLACES=189, PETRI_TRANSITIONS=244} [2024-06-28 04:32:03,077 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-28 04:32:03,077 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 244 transitions, 3121 flow [2024-06-28 04:32:03,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:03,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:03,077 INFO 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 04:32:03,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 04:32:03,078 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 04:32:03,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:03,078 INFO L85 PathProgramCache]: Analyzing trace with hash 556822553, now seen corresponding path program 7 times [2024-06-28 04:32:03,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:03,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241130785] [2024-06-28 04:32:03,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:03,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:05,518 INFO 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 04:32:05,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:05,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241130785] [2024-06-28 04:32:05,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241130785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:05,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:05,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:05,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938898594] [2024-06-28 04:32:05,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:05,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:05,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:05,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:05,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:05,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:32:05,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 244 transitions, 3121 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:05,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:05,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:32:05,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:06,895 INFO L124 PetriNetUnfolderBase]: 2330/3714 cut-off events. [2024-06-28 04:32:06,895 INFO L125 PetriNetUnfolderBase]: For 141883/141883 co-relation queries the response was YES. [2024-06-28 04:32:06,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24061 conditions, 3714 events. 2330/3714 cut-off events. For 141883/141883 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 20776 event pairs, 536 based on Foata normal form. 4/3714 useless extension candidates. Maximal degree in co-relation 23973. Up to 3011 conditions per place. [2024-06-28 04:32:06,936 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 171 selfloop transitions, 101 changer transitions 0/277 dead transitions. [2024-06-28 04:32:06,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 277 transitions, 4023 flow [2024-06-28 04:32:06,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:32:06,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:32:06,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 04:32:06,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-28 04:32:06,938 INFO L175 Difference]: Start difference. First operand has 189 places, 244 transitions, 3121 flow. Second operand 8 states and 143 transitions. [2024-06-28 04:32:06,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 277 transitions, 4023 flow [2024-06-28 04:32:07,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 277 transitions, 3813 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-28 04:32:07,191 INFO L231 Difference]: Finished difference. Result has 193 places, 250 transitions, 3229 flow [2024-06-28 04:32:07,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2929, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3229, PETRI_PLACES=193, PETRI_TRANSITIONS=250} [2024-06-28 04:32:07,191 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-28 04:32:07,191 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 250 transitions, 3229 flow [2024-06-28 04:32:07,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:07,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:07,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:07,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 04:32:07,192 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 04:32:07,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:07,192 INFO L85 PathProgramCache]: Analyzing trace with hash 391687691, now seen corresponding path program 8 times [2024-06-28 04:32:07,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:07,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573494501] [2024-06-28 04:32:07,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:07,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:09,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:09,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:09,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573494501] [2024-06-28 04:32:09,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573494501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:09,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:09,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:09,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409194711] [2024-06-28 04:32:09,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:09,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:09,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:09,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:09,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:09,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:32:09,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 250 transitions, 3229 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:09,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:09,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:32:09,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:11,280 INFO L124 PetriNetUnfolderBase]: 2318/3708 cut-off events. [2024-06-28 04:32:11,280 INFO L125 PetriNetUnfolderBase]: For 144003/144003 co-relation queries the response was YES. [2024-06-28 04:32:11,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23745 conditions, 3708 events. 2318/3708 cut-off events. For 144003/144003 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 21142 event pairs, 913 based on Foata normal form. 4/3711 useless extension candidates. Maximal degree in co-relation 23655. Up to 3432 conditions per place. [2024-06-28 04:32:11,311 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 242 selfloop transitions, 27 changer transitions 0/274 dead transitions. [2024-06-28 04:32:11,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 274 transitions, 3829 flow [2024-06-28 04:32:11,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:32:11,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:32:11,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 04:32:11,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-28 04:32:11,314 INFO L175 Difference]: Start difference. First operand has 193 places, 250 transitions, 3229 flow. Second operand 8 states and 135 transitions. [2024-06-28 04:32:11,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 274 transitions, 3829 flow [2024-06-28 04:32:11,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 274 transitions, 3635 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-28 04:32:11,583 INFO L231 Difference]: Finished difference. Result has 197 places, 250 transitions, 3095 flow [2024-06-28 04:32:11,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3035, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3095, PETRI_PLACES=197, PETRI_TRANSITIONS=250} [2024-06-28 04:32:11,583 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-28 04:32:11,584 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 250 transitions, 3095 flow [2024-06-28 04:32:11,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:11,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:11,584 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] [2024-06-28 04:32:11,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 04:32:11,584 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 04:32:11,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:11,585 INFO L85 PathProgramCache]: Analyzing trace with hash 480005751, now seen corresponding path program 9 times [2024-06-28 04:32:11,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:11,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465107347] [2024-06-28 04:32:11,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:11,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:11,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:14,282 INFO 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 04:32:14,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:14,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465107347] [2024-06-28 04:32:14,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465107347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:14,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:14,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:14,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586945111] [2024-06-28 04:32:14,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:14,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:14,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:14,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:14,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:14,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:32:14,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 250 transitions, 3095 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:14,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:14,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:32:14,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:15,582 INFO L124 PetriNetUnfolderBase]: 2390/3784 cut-off events. [2024-06-28 04:32:15,582 INFO L125 PetriNetUnfolderBase]: For 154845/154845 co-relation queries the response was YES. [2024-06-28 04:32:15,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23885 conditions, 3784 events. 2390/3784 cut-off events. For 154845/154845 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 21119 event pairs, 608 based on Foata normal form. 8/3785 useless extension candidates. Maximal degree in co-relation 23794. Up to 3134 conditions per place. [2024-06-28 04:32:15,611 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 165 selfloop transitions, 117 changer transitions 0/287 dead transitions. [2024-06-28 04:32:15,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 287 transitions, 4089 flow [2024-06-28 04:32:15,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:32:15,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:32:15,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-28 04:32:15,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-28 04:32:15,613 INFO L175 Difference]: Start difference. First operand has 197 places, 250 transitions, 3095 flow. Second operand 10 states and 169 transitions. [2024-06-28 04:32:15,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 287 transitions, 4089 flow [2024-06-28 04:32:15,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 287 transitions, 4003 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-28 04:32:15,796 INFO L231 Difference]: Finished difference. Result has 200 places, 259 transitions, 3417 flow [2024-06-28 04:32:15,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3009, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3417, PETRI_PLACES=200, PETRI_TRANSITIONS=259} [2024-06-28 04:32:15,797 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-28 04:32:15,797 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 259 transitions, 3417 flow [2024-06-28 04:32:15,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:15,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:15,797 INFO 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 04:32:15,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 04:32:15,798 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 04:32:15,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:15,798 INFO L85 PathProgramCache]: Analyzing trace with hash 996980847, now seen corresponding path program 10 times [2024-06-28 04:32:15,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:15,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526226376] [2024-06-28 04:32:15,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:15,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:15,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:18,479 INFO 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 04:32:18,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:18,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526226376] [2024-06-28 04:32:18,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526226376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:18,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:18,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:18,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898031705] [2024-06-28 04:32:18,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:18,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:18,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:18,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:18,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:18,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:32:18,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 259 transitions, 3417 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:18,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:18,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:32:18,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:20,293 INFO L124 PetriNetUnfolderBase]: 2494/3945 cut-off events. [2024-06-28 04:32:20,294 INFO L125 PetriNetUnfolderBase]: For 172502/172502 co-relation queries the response was YES. [2024-06-28 04:32:20,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26006 conditions, 3945 events. 2494/3945 cut-off events. For 172502/172502 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 22388 event pairs, 1002 based on Foata normal form. 4/3948 useless extension candidates. Maximal degree in co-relation 25914. Up to 3650 conditions per place. [2024-06-28 04:32:20,325 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 264 selfloop transitions, 33 changer transitions 0/302 dead transitions. [2024-06-28 04:32:20,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 302 transitions, 4488 flow [2024-06-28 04:32:20,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:32:20,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:32:20,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 182 transitions. [2024-06-28 04:32:20,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3611111111111111 [2024-06-28 04:32:20,332 INFO L175 Difference]: Start difference. First operand has 200 places, 259 transitions, 3417 flow. Second operand 12 states and 182 transitions. [2024-06-28 04:32:20,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 302 transitions, 4488 flow [2024-06-28 04:32:20,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 302 transitions, 4046 flow, removed 76 selfloop flow, removed 8 redundant places. [2024-06-28 04:32:20,579 INFO L231 Difference]: Finished difference. Result has 206 places, 272 transitions, 3290 flow [2024-06-28 04:32:20,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3022, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3290, PETRI_PLACES=206, PETRI_TRANSITIONS=272} [2024-06-28 04:32:20,580 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-28 04:32:20,580 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 272 transitions, 3290 flow [2024-06-28 04:32:20,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:20,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:20,580 INFO 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 04:32:20,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 04:32:20,580 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 04:32:20,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:20,581 INFO L85 PathProgramCache]: Analyzing trace with hash 590817297, now seen corresponding path program 11 times [2024-06-28 04:32:20,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:20,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946522882] [2024-06-28 04:32:20,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:20,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:23,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:23,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:23,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946522882] [2024-06-28 04:32:23,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946522882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:23,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:23,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:23,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049540505] [2024-06-28 04:32:23,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:23,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:23,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:23,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:23,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:23,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:32:23,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 272 transitions, 3290 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:23,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:23,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:32:23,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:24,536 INFO L124 PetriNetUnfolderBase]: 2502/3944 cut-off events. [2024-06-28 04:32:24,536 INFO L125 PetriNetUnfolderBase]: For 168995/168995 co-relation queries the response was YES. [2024-06-28 04:32:24,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24989 conditions, 3944 events. 2502/3944 cut-off events. For 168995/168995 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 22033 event pairs, 614 based on Foata normal form. 8/3945 useless extension candidates. Maximal degree in co-relation 24894. Up to 3214 conditions per place. [2024-06-28 04:32:24,574 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 165 selfloop transitions, 135 changer transitions 0/305 dead transitions. [2024-06-28 04:32:24,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 305 transitions, 4212 flow [2024-06-28 04:32:24,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:32:24,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:32:24,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-28 04:32:24,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-28 04:32:24,576 INFO L175 Difference]: Start difference. First operand has 206 places, 272 transitions, 3290 flow. Second operand 11 states and 183 transitions. [2024-06-28 04:32:24,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 305 transitions, 4212 flow [2024-06-28 04:32:24,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 305 transitions, 4018 flow, removed 21 selfloop flow, removed 10 redundant places. [2024-06-28 04:32:24,883 INFO L231 Difference]: Finished difference. Result has 207 places, 275 transitions, 3412 flow [2024-06-28 04:32:24,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3096, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3412, PETRI_PLACES=207, PETRI_TRANSITIONS=275} [2024-06-28 04:32:24,884 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-28 04:32:24,884 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 275 transitions, 3412 flow [2024-06-28 04:32:24,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:24,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:24,884 INFO 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 04:32:24,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 04:32:24,885 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 04:32:24,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:24,885 INFO L85 PathProgramCache]: Analyzing trace with hash 990314607, now seen corresponding path program 12 times [2024-06-28 04:32:24,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:24,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104813593] [2024-06-28 04:32:24,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:24,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:24,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:27,535 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 04:32:27,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:27,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104813593] [2024-06-28 04:32:27,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104813593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:27,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:27,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:27,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648084211] [2024-06-28 04:32:27,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:27,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:27,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:27,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:27,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:27,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:32:27,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 275 transitions, 3412 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:27,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:27,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:32:27,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:29,007 INFO L124 PetriNetUnfolderBase]: 2490/3941 cut-off events. [2024-06-28 04:32:29,007 INFO L125 PetriNetUnfolderBase]: For 165613/165613 co-relation queries the response was YES. [2024-06-28 04:32:29,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25144 conditions, 3941 events. 2490/3941 cut-off events. For 165613/165613 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 22389 event pairs, 996 based on Foata normal form. 4/3944 useless extension candidates. Maximal degree in co-relation 25049. Up to 3654 conditions per place. [2024-06-28 04:32:29,049 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 260 selfloop transitions, 33 changer transitions 0/298 dead transitions. [2024-06-28 04:32:29,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 298 transitions, 4152 flow [2024-06-28 04:32:29,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:32:29,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:32:29,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-28 04:32:29,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2024-06-28 04:32:29,051 INFO L175 Difference]: Start difference. First operand has 207 places, 275 transitions, 3412 flow. Second operand 10 states and 153 transitions. [2024-06-28 04:32:29,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 298 transitions, 4152 flow [2024-06-28 04:32:29,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 298 transitions, 3827 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-06-28 04:32:29,294 INFO L231 Difference]: Finished difference. Result has 208 places, 275 transitions, 3159 flow [2024-06-28 04:32:29,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3087, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3159, PETRI_PLACES=208, PETRI_TRANSITIONS=275} [2024-06-28 04:32:29,294 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-28 04:32:29,294 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 275 transitions, 3159 flow [2024-06-28 04:32:29,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:29,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:29,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:29,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 04:32:29,295 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 04:32:29,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:29,295 INFO L85 PathProgramCache]: Analyzing trace with hash 797679057, now seen corresponding path program 13 times [2024-06-28 04:32:29,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:29,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846799499] [2024-06-28 04:32:29,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:29,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:29,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:31,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:31,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:31,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846799499] [2024-06-28 04:32:31,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846799499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:31,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:31,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:31,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297274360] [2024-06-28 04:32:31,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:31,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:31,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:31,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:31,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:31,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:32:31,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 275 transitions, 3159 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:31,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:31,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:32:31,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:33,224 INFO L124 PetriNetUnfolderBase]: 2478/3925 cut-off events. [2024-06-28 04:32:33,224 INFO L125 PetriNetUnfolderBase]: For 163780/163780 co-relation queries the response was YES. [2024-06-28 04:32:33,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24241 conditions, 3925 events. 2478/3925 cut-off events. For 163780/163780 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 22319 event pairs, 994 based on Foata normal form. 4/3928 useless extension candidates. Maximal degree in co-relation 24147. Up to 3690 conditions per place. [2024-06-28 04:32:33,342 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 266 selfloop transitions, 23 changer transitions 0/294 dead transitions. [2024-06-28 04:32:33,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 294 transitions, 3783 flow [2024-06-28 04:32:33,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:32:33,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:32:33,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-28 04:32:33,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 04:32:33,345 INFO L175 Difference]: Start difference. First operand has 208 places, 275 transitions, 3159 flow. Second operand 8 states and 128 transitions. [2024-06-28 04:32:33,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 294 transitions, 3783 flow [2024-06-28 04:32:33,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 294 transitions, 3699 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-28 04:32:33,625 INFO L231 Difference]: Finished difference. Result has 207 places, 275 transitions, 3127 flow [2024-06-28 04:32:33,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3075, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3127, PETRI_PLACES=207, PETRI_TRANSITIONS=275} [2024-06-28 04:32:33,626 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-28 04:32:33,626 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 275 transitions, 3127 flow [2024-06-28 04:32:33,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:33,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:33,626 INFO 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 04:32:33,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 04:32:33,630 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 04:32:33,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:33,631 INFO L85 PathProgramCache]: Analyzing trace with hash 675727385, now seen corresponding path program 14 times [2024-06-28 04:32:33,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:33,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32976675] [2024-06-28 04:32:33,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:33,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:36,241 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 04:32:36,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:36,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32976675] [2024-06-28 04:32:36,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32976675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:36,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:36,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:36,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776242214] [2024-06-28 04:32:36,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:36,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:36,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:36,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:36,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:36,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:32:36,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 275 transitions, 3127 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:36,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:36,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:32:36,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:37,600 INFO L124 PetriNetUnfolderBase]: 2466/3892 cut-off events. [2024-06-28 04:32:37,600 INFO L125 PetriNetUnfolderBase]: For 162549/162549 co-relation queries the response was YES. [2024-06-28 04:32:37,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23959 conditions, 3892 events. 2466/3892 cut-off events. For 162549/162549 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 21696 event pairs, 622 based on Foata normal form. 4/3889 useless extension candidates. Maximal degree in co-relation 23864. Up to 3190 conditions per place. [2024-06-28 04:32:37,639 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 161 selfloop transitions, 129 changer transitions 0/295 dead transitions. [2024-06-28 04:32:37,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 295 transitions, 3859 flow [2024-06-28 04:32:37,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:32:37,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:32:37,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 04:32:37,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 04:32:37,652 INFO L175 Difference]: Start difference. First operand has 207 places, 275 transitions, 3127 flow. Second operand 8 states and 136 transitions. [2024-06-28 04:32:37,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 295 transitions, 3859 flow [2024-06-28 04:32:37,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 295 transitions, 3799 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-28 04:32:37,941 INFO L231 Difference]: Finished difference. Result has 209 places, 275 transitions, 3331 flow [2024-06-28 04:32:37,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3067, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3331, PETRI_PLACES=209, PETRI_TRANSITIONS=275} [2024-06-28 04:32:37,941 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-28 04:32:37,941 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 275 transitions, 3331 flow [2024-06-28 04:32:37,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:37,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:37,942 INFO 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 04:32:37,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 04:32:37,942 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 04:32:37,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:37,942 INFO L85 PathProgramCache]: Analyzing trace with hash 469289271, now seen corresponding path program 3 times [2024-06-28 04:32:37,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:37,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446222797] [2024-06-28 04:32:37,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:37,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:37,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:41,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:41,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:41,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446222797] [2024-06-28 04:32:41,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446222797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:41,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:41,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:32:41,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406425612] [2024-06-28 04:32:41,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:41,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:32:41,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:41,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:32:41,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:32:41,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:32:41,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 275 transitions, 3331 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:41,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:41,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:32:41,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:42,626 INFO L124 PetriNetUnfolderBase]: 2510/3964 cut-off events. [2024-06-28 04:32:42,626 INFO L125 PetriNetUnfolderBase]: For 181518/181518 co-relation queries the response was YES. [2024-06-28 04:32:42,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24892 conditions, 3964 events. 2510/3964 cut-off events. For 181518/181518 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 22308 event pairs, 646 based on Foata normal form. 12/3969 useless extension candidates. Maximal degree in co-relation 24796. Up to 3580 conditions per place. [2024-06-28 04:32:42,665 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 234 selfloop transitions, 60 changer transitions 0/299 dead transitions. [2024-06-28 04:32:42,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 299 transitions, 4055 flow [2024-06-28 04:32:42,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:32:42,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:32:42,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 04:32:42,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-28 04:32:42,666 INFO L175 Difference]: Start difference. First operand has 209 places, 275 transitions, 3331 flow. Second operand 8 states and 134 transitions. [2024-06-28 04:32:42,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 299 transitions, 4055 flow [2024-06-28 04:32:42,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 299 transitions, 3775 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-28 04:32:42,970 INFO L231 Difference]: Finished difference. Result has 209 places, 276 transitions, 3197 flow [2024-06-28 04:32:42,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3051, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3197, PETRI_PLACES=209, PETRI_TRANSITIONS=276} [2024-06-28 04:32:42,971 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-28 04:32:42,971 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 276 transitions, 3197 flow [2024-06-28 04:32:42,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:42,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:42,972 INFO 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 04:32:42,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 04:32:42,972 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 04:32:42,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:42,972 INFO L85 PathProgramCache]: Analyzing trace with hash 882596151, now seen corresponding path program 4 times [2024-06-28 04:32:42,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:42,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115243100] [2024-06-28 04:32:42,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:42,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:42,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:46,433 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 04:32:46,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:46,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115243100] [2024-06-28 04:32:46,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115243100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:46,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:46,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:32:46,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537800473] [2024-06-28 04:32:46,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:46,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:32:46,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:46,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:32:46,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:32:46,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:32:46,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 276 transitions, 3197 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:46,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:46,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:32:46,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:47,875 INFO L124 PetriNetUnfolderBase]: 2554/4059 cut-off events. [2024-06-28 04:32:47,875 INFO L125 PetriNetUnfolderBase]: For 188563/188563 co-relation queries the response was YES. [2024-06-28 04:32:47,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25164 conditions, 4059 events. 2554/4059 cut-off events. For 188563/188563 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23304 event pairs, 1030 based on Foata normal form. 12/4070 useless extension candidates. Maximal degree in co-relation 25067. Up to 3800 conditions per place. [2024-06-28 04:32:47,924 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 274 selfloop transitions, 18 changer transitions 0/297 dead transitions. [2024-06-28 04:32:47,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 297 transitions, 3891 flow [2024-06-28 04:32:47,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:32:47,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:32:47,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-28 04:32:47,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-28 04:32:47,926 INFO L175 Difference]: Start difference. First operand has 209 places, 276 transitions, 3197 flow. Second operand 8 states and 126 transitions. [2024-06-28 04:32:47,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 297 transitions, 3891 flow [2024-06-28 04:32:48,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 297 transitions, 3767 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 04:32:48,192 INFO L231 Difference]: Finished difference. Result has 211 places, 277 transitions, 3137 flow [2024-06-28 04:32:48,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3073, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3137, PETRI_PLACES=211, PETRI_TRANSITIONS=277} [2024-06-28 04:32:48,193 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-28 04:32:48,193 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 277 transitions, 3137 flow [2024-06-28 04:32:48,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:48,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:48,194 INFO 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 04:32:48,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 04:32:48,194 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 04:32:48,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:48,194 INFO L85 PathProgramCache]: Analyzing trace with hash 602861293, now seen corresponding path program 5 times [2024-06-28 04:32:48,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:48,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037845847] [2024-06-28 04:32:48,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:48,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:51,565 INFO 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 04:32:51,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:51,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037845847] [2024-06-28 04:32:51,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037845847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:51,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:51,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:32:51,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012802555] [2024-06-28 04:32:51,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:51,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:32:51,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:51,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:32:51,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:32:51,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:32:51,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 277 transitions, 3137 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:51,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:51,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:32:51,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:53,044 INFO L124 PetriNetUnfolderBase]: 2556/4065 cut-off events. [2024-06-28 04:32:53,045 INFO L125 PetriNetUnfolderBase]: For 181087/181087 co-relation queries the response was YES. [2024-06-28 04:32:53,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24913 conditions, 4065 events. 2556/4065 cut-off events. For 181087/181087 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23328 event pairs, 1010 based on Foata normal form. 8/4072 useless extension candidates. Maximal degree in co-relation 24815. Up to 3768 conditions per place. [2024-06-28 04:32:53,082 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 277 selfloop transitions, 21 changer transitions 0/303 dead transitions. [2024-06-28 04:32:53,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 303 transitions, 3887 flow [2024-06-28 04:32:53,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:32:53,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:32:53,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-28 04:32:53,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-28 04:32:53,083 INFO L175 Difference]: Start difference. First operand has 211 places, 277 transitions, 3137 flow. Second operand 9 states and 141 transitions. [2024-06-28 04:32:53,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 303 transitions, 3887 flow [2024-06-28 04:32:53,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 303 transitions, 3845 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-28 04:32:53,452 INFO L231 Difference]: Finished difference. Result has 214 places, 278 transitions, 3165 flow [2024-06-28 04:32:53,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3095, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3165, PETRI_PLACES=214, PETRI_TRANSITIONS=278} [2024-06-28 04:32:53,454 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-28 04:32:53,454 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 278 transitions, 3165 flow [2024-06-28 04:32:53,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:53,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:53,455 INFO 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 04:32:53,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 04:32:53,455 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 04:32:53,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:53,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1004614287, now seen corresponding path program 1 times [2024-06-28 04:32:53,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:53,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720538548] [2024-06-28 04:32:53,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:53,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:53,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:56,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:56,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:56,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720538548] [2024-06-28 04:32:56,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720538548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:56,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:56,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:32:56,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526468760] [2024-06-28 04:32:56,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:56,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:32:56,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:56,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:32:56,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:32:56,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:32:56,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 278 transitions, 3165 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:56,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:56,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:32:56,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:57,880 INFO L124 PetriNetUnfolderBase]: 2566/4071 cut-off events. [2024-06-28 04:32:57,880 INFO L125 PetriNetUnfolderBase]: For 174845/174845 co-relation queries the response was YES. [2024-06-28 04:32:57,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24568 conditions, 4071 events. 2566/4071 cut-off events. For 174845/174845 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 23248 event pairs, 988 based on Foata normal form. 8/4078 useless extension candidates. Maximal degree in co-relation 24469. Up to 3756 conditions per place. [2024-06-28 04:32:57,923 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 276 selfloop transitions, 26 changer transitions 0/307 dead transitions. [2024-06-28 04:32:57,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 307 transitions, 3894 flow [2024-06-28 04:32:57,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:32:57,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:32:57,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 163 transitions. [2024-06-28 04:32:57,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3528138528138528 [2024-06-28 04:32:57,925 INFO L175 Difference]: Start difference. First operand has 214 places, 278 transitions, 3165 flow. Second operand 11 states and 163 transitions. [2024-06-28 04:32:57,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 307 transitions, 3894 flow [2024-06-28 04:32:58,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 307 transitions, 3840 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-28 04:32:58,230 INFO L231 Difference]: Finished difference. Result has 219 places, 279 transitions, 3188 flow [2024-06-28 04:32:58,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3111, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3188, PETRI_PLACES=219, PETRI_TRANSITIONS=279} [2024-06-28 04:32:58,230 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-28 04:32:58,231 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 279 transitions, 3188 flow [2024-06-28 04:32:58,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:58,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:58,231 INFO 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 04:32:58,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 04:32:58,231 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 04:32:58,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:58,232 INFO L85 PathProgramCache]: Analyzing trace with hash 591250527, now seen corresponding path program 1 times [2024-06-28 04:32:58,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:58,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214766726] [2024-06-28 04:32:58,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:58,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:01,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:33:01,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:01,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214766726] [2024-06-28 04:33:01,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214766726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:01,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:01,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:33:01,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632471479] [2024-06-28 04:33:01,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:01,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:33:01,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:01,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:33:01,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:33:01,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:33:01,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 279 transitions, 3188 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 04:33:01,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:01,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:33:01,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:02,892 INFO L124 PetriNetUnfolderBase]: 2657/4220 cut-off events. [2024-06-28 04:33:02,893 INFO L125 PetriNetUnfolderBase]: For 173742/173742 co-relation queries the response was YES. [2024-06-28 04:33:02,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25557 conditions, 4220 events. 2657/4220 cut-off events. For 173742/173742 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 24129 event pairs, 681 based on Foata normal form. 2/4221 useless extension candidates. Maximal degree in co-relation 25456. Up to 3856 conditions per place. [2024-06-28 04:33:02,936 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 276 selfloop transitions, 62 changer transitions 0/343 dead transitions. [2024-06-28 04:33:02,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 343 transitions, 4354 flow [2024-06-28 04:33:02,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:33:02,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:33:02,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-28 04:33:02,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261904761904762 [2024-06-28 04:33:02,938 INFO L175 Difference]: Start difference. First operand has 219 places, 279 transitions, 3188 flow. Second operand 10 states and 179 transitions. [2024-06-28 04:33:02,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 343 transitions, 4354 flow [2024-06-28 04:33:03,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 343 transitions, 4262 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-28 04:33:03,252 INFO L231 Difference]: Finished difference. Result has 222 places, 297 transitions, 3472 flow [2024-06-28 04:33:03,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3101, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3472, PETRI_PLACES=222, PETRI_TRANSITIONS=297} [2024-06-28 04:33:03,253 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-28 04:33:03,253 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 297 transitions, 3472 flow [2024-06-28 04:33:03,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 04:33:03,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:03,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:33:03,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 04:33:03,254 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 04:33:03,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:03,254 INFO L85 PathProgramCache]: Analyzing trace with hash 103313405, now seen corresponding path program 2 times [2024-06-28 04:33:03,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:03,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768213792] [2024-06-28 04:33:03,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:03,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:03,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:06,147 INFO 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 04:33:06,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:06,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768213792] [2024-06-28 04:33:06,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768213792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:06,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:06,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:33:06,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166267262] [2024-06-28 04:33:06,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:06,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:33:06,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:06,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:33:06,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:33:06,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:33:06,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 297 transitions, 3472 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:06,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:06,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:33:06,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:07,547 INFO L124 PetriNetUnfolderBase]: 2665/4228 cut-off events. [2024-06-28 04:33:07,548 INFO L125 PetriNetUnfolderBase]: For 180125/180125 co-relation queries the response was YES. [2024-06-28 04:33:07,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25775 conditions, 4228 events. 2665/4228 cut-off events. For 180125/180125 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 24152 event pairs, 690 based on Foata normal form. 2/4229 useless extension candidates. Maximal degree in co-relation 25673. Up to 3864 conditions per place. [2024-06-28 04:33:07,589 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 272 selfloop transitions, 64 changer transitions 0/341 dead transitions. [2024-06-28 04:33:07,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 341 transitions, 4448 flow [2024-06-28 04:33:07,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:33:07,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:33:07,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-28 04:33:07,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-28 04:33:07,594 INFO L175 Difference]: Start difference. First operand has 222 places, 297 transitions, 3472 flow. Second operand 9 states and 165 transitions. [2024-06-28 04:33:07,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 341 transitions, 4448 flow [2024-06-28 04:33:07,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 341 transitions, 4360 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-28 04:33:07,907 INFO L231 Difference]: Finished difference. Result has 229 places, 300 transitions, 3578 flow [2024-06-28 04:33:07,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3392, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3578, PETRI_PLACES=229, PETRI_TRANSITIONS=300} [2024-06-28 04:33:07,908 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-28 04:33:07,908 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 300 transitions, 3578 flow [2024-06-28 04:33:07,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:07,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:07,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:33:07,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 04:33:07,909 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 04:33:07,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:07,909 INFO L85 PathProgramCache]: Analyzing trace with hash 110931965, now seen corresponding path program 3 times [2024-06-28 04:33:07,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:07,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028113593] [2024-06-28 04:33:07,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:07,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:07,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:11,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:33:11,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:11,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028113593] [2024-06-28 04:33:11,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028113593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:11,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:11,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:33:11,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842476067] [2024-06-28 04:33:11,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:11,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:33:11,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:11,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:33:11,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:33:11,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:33:11,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 300 transitions, 3578 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:11,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:11,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:33:11,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:12,454 INFO L124 PetriNetUnfolderBase]: 2683/4258 cut-off events. [2024-06-28 04:33:12,454 INFO L125 PetriNetUnfolderBase]: For 186166/186166 co-relation queries the response was YES. [2024-06-28 04:33:12,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26248 conditions, 4258 events. 2683/4258 cut-off events. For 186166/186166 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 24356 event pairs, 704 based on Foata normal form. 2/4259 useless extension candidates. Maximal degree in co-relation 26143. Up to 3951 conditions per place. [2024-06-28 04:33:12,496 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 273 selfloop transitions, 64 changer transitions 0/342 dead transitions. [2024-06-28 04:33:12,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 342 transitions, 4505 flow [2024-06-28 04:33:12,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:33:12,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:33:12,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-28 04:33:12,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-28 04:33:12,498 INFO L175 Difference]: Start difference. First operand has 229 places, 300 transitions, 3578 flow. Second operand 9 states and 157 transitions. [2024-06-28 04:33:12,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 342 transitions, 4505 flow [2024-06-28 04:33:12,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 342 transitions, 4395 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-28 04:33:12,836 INFO L231 Difference]: Finished difference. Result has 234 places, 310 transitions, 3779 flow [2024-06-28 04:33:12,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3480, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3779, PETRI_PLACES=234, PETRI_TRANSITIONS=310} [2024-06-28 04:33:12,838 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-28 04:33:12,838 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 310 transitions, 3779 flow [2024-06-28 04:33:12,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:12,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:12,839 INFO 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 04:33:12,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 04:33:12,839 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 04:33:12,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:12,839 INFO L85 PathProgramCache]: Analyzing trace with hash 106173341, now seen corresponding path program 1 times [2024-06-28 04:33:12,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:12,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854902634] [2024-06-28 04:33:12,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:12,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:12,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:16,101 INFO 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 04:33:16,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:16,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854902634] [2024-06-28 04:33:16,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854902634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:16,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:16,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:33:16,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981419561] [2024-06-28 04:33:16,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:16,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:33:16,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:16,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:33:16,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:33:16,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:33:16,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 310 transitions, 3779 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:16,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:16,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:33:16,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:17,440 INFO L124 PetriNetUnfolderBase]: 2729/4324 cut-off events. [2024-06-28 04:33:17,441 INFO L125 PetriNetUnfolderBase]: For 187488/187488 co-relation queries the response was YES. [2024-06-28 04:33:17,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26579 conditions, 4324 events. 2729/4324 cut-off events. For 187488/187488 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 24803 event pairs, 698 based on Foata normal form. 2/4325 useless extension candidates. Maximal degree in co-relation 26473. Up to 3979 conditions per place. [2024-06-28 04:33:17,492 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 282 selfloop transitions, 69 changer transitions 0/356 dead transitions. [2024-06-28 04:33:17,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 356 transitions, 4701 flow [2024-06-28 04:33:17,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:33:17,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:33:17,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 04:33:17,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-28 04:33:17,493 INFO L175 Difference]: Start difference. First operand has 234 places, 310 transitions, 3779 flow. Second operand 9 states and 164 transitions. [2024-06-28 04:33:17,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 356 transitions, 4701 flow [2024-06-28 04:33:17,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 356 transitions, 4559 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-28 04:33:17,848 INFO L231 Difference]: Finished difference. Result has 238 places, 319 transitions, 3915 flow [2024-06-28 04:33:17,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3637, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3915, PETRI_PLACES=238, PETRI_TRANSITIONS=319} [2024-06-28 04:33:17,849 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-28 04:33:17,849 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 319 transitions, 3915 flow [2024-06-28 04:33:17,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:17,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:17,849 INFO 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 04:33:17,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 04:33:17,849 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 04:33:17,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:17,850 INFO L85 PathProgramCache]: Analyzing trace with hash -296686113, now seen corresponding path program 4 times [2024-06-28 04:33:17,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:17,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963704005] [2024-06-28 04:33:17,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:17,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:17,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:20,761 INFO 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 04:33:20,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:20,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963704005] [2024-06-28 04:33:20,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963704005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:20,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:20,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:33:20,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968709066] [2024-06-28 04:33:20,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:20,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:33:20,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:20,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:33:20,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:33:20,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:33:20,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 319 transitions, 3915 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:20,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:20,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:33:20,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:22,203 INFO L124 PetriNetUnfolderBase]: 2724/4311 cut-off events. [2024-06-28 04:33:22,203 INFO L125 PetriNetUnfolderBase]: For 190771/190771 co-relation queries the response was YES. [2024-06-28 04:33:22,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26884 conditions, 4311 events. 2724/4311 cut-off events. For 190771/190771 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 24581 event pairs, 709 based on Foata normal form. 2/4312 useless extension candidates. Maximal degree in co-relation 26776. Up to 4010 conditions per place. [2024-06-28 04:33:22,249 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 273 selfloop transitions, 67 changer transitions 0/345 dead transitions. [2024-06-28 04:33:22,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 345 transitions, 4671 flow [2024-06-28 04:33:22,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:33:22,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:33:22,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-28 04:33:22,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-28 04:33:22,252 INFO L175 Difference]: Start difference. First operand has 238 places, 319 transitions, 3915 flow. Second operand 9 states and 150 transitions. [2024-06-28 04:33:22,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 345 transitions, 4671 flow [2024-06-28 04:33:22,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 345 transitions, 4479 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-28 04:33:22,660 INFO L231 Difference]: Finished difference. Result has 241 places, 319 transitions, 3863 flow [2024-06-28 04:33:22,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3723, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3863, PETRI_PLACES=241, PETRI_TRANSITIONS=319} [2024-06-28 04:33:22,669 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-28 04:33:22,669 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 319 transitions, 3863 flow [2024-06-28 04:33:22,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:22,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:22,669 INFO 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 04:33:22,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 04:33:22,669 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 04:33:22,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:22,670 INFO L85 PathProgramCache]: Analyzing trace with hash -773405065, now seen corresponding path program 2 times [2024-06-28 04:33:22,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:22,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022965966] [2024-06-28 04:33:22,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:22,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:22,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:25,448 INFO 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 04:33:25,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:25,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022965966] [2024-06-28 04:33:25,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022965966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:25,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:25,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:33:25,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681304322] [2024-06-28 04:33:25,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:25,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:33:25,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:25,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:33:25,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:33:25,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:33:25,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 319 transitions, 3863 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:25,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:25,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:33:25,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:27,051 INFO L124 PetriNetUnfolderBase]: 2888/4575 cut-off events. [2024-06-28 04:33:27,051 INFO L125 PetriNetUnfolderBase]: For 208823/208825 co-relation queries the response was YES. [2024-06-28 04:33:27,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28492 conditions, 4575 events. 2888/4575 cut-off events. For 208823/208825 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 26467 event pairs, 588 based on Foata normal form. 4/4578 useless extension candidates. Maximal degree in co-relation 28383. Up to 3696 conditions per place. [2024-06-28 04:33:27,094 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 253 selfloop transitions, 137 changer transitions 0/395 dead transitions. [2024-06-28 04:33:27,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 395 transitions, 5683 flow [2024-06-28 04:33:27,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:33:27,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:33:27,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-28 04:33:27,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-28 04:33:27,096 INFO L175 Difference]: Start difference. First operand has 241 places, 319 transitions, 3863 flow. Second operand 9 states and 174 transitions. [2024-06-28 04:33:27,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 395 transitions, 5683 flow [2024-06-28 04:33:27,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 395 transitions, 5547 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 04:33:27,463 INFO L231 Difference]: Finished difference. Result has 246 places, 346 transitions, 4456 flow [2024-06-28 04:33:27,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3727, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4456, PETRI_PLACES=246, PETRI_TRANSITIONS=346} [2024-06-28 04:33:27,463 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-28 04:33:27,463 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 346 transitions, 4456 flow [2024-06-28 04:33:27,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:27,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:27,464 INFO 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 04:33:27,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 04:33:27,464 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 04:33:27,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:27,464 INFO L85 PathProgramCache]: Analyzing trace with hash 396626845, now seen corresponding path program 3 times [2024-06-28 04:33:27,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:27,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009921559] [2024-06-28 04:33:27,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:27,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:27,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:30,326 INFO 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 04:33:30,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:30,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009921559] [2024-06-28 04:33:30,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009921559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:30,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:30,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:33:30,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376715861] [2024-06-28 04:33:30,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:30,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:33:30,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:30,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:33:30,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:33:30,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:33:30,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 346 transitions, 4456 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:30,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:30,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:33:30,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:31,960 INFO L124 PetriNetUnfolderBase]: 2898/4587 cut-off events. [2024-06-28 04:33:31,961 INFO L125 PetriNetUnfolderBase]: For 219000/219002 co-relation queries the response was YES. [2024-06-28 04:33:31,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29695 conditions, 4587 events. 2898/4587 cut-off events. For 219000/219002 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 26493 event pairs, 590 based on Foata normal form. 4/4590 useless extension candidates. Maximal degree in co-relation 29583. Up to 3706 conditions per place. [2024-06-28 04:33:32,012 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 248 selfloop transitions, 141 changer transitions 0/394 dead transitions. [2024-06-28 04:33:32,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 394 transitions, 5960 flow [2024-06-28 04:33:32,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:33:32,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:33:32,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-28 04:33:32,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-28 04:33:32,014 INFO L175 Difference]: Start difference. First operand has 246 places, 346 transitions, 4456 flow. Second operand 9 states and 170 transitions. [2024-06-28 04:33:32,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 394 transitions, 5960 flow [2024-06-28 04:33:32,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 394 transitions, 5794 flow, removed 67 selfloop flow, removed 3 redundant places. [2024-06-28 04:33:32,479 INFO L231 Difference]: Finished difference. Result has 253 places, 350 transitions, 4702 flow [2024-06-28 04:33:32,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4324, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4702, PETRI_PLACES=253, PETRI_TRANSITIONS=350} [2024-06-28 04:33:32,479 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-28 04:33:32,479 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 350 transitions, 4702 flow [2024-06-28 04:33:32,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:32,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:32,480 INFO 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 04:33:32,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 04:33:32,480 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 04:33:32,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:32,480 INFO L85 PathProgramCache]: Analyzing trace with hash -291921537, now seen corresponding path program 4 times [2024-06-28 04:33:32,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:32,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140000864] [2024-06-28 04:33:32,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:32,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:32,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:35,331 INFO 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 04:33:35,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:35,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140000864] [2024-06-28 04:33:35,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140000864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:35,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:35,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:33:35,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660086400] [2024-06-28 04:33:35,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:35,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:33:35,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:35,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:33:35,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:33:35,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:33:35,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 350 transitions, 4702 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:35,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:35,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:33:35,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:36,716 INFO L124 PetriNetUnfolderBase]: 2892/4577 cut-off events. [2024-06-28 04:33:36,717 INFO L125 PetriNetUnfolderBase]: For 222077/222077 co-relation queries the response was YES. [2024-06-28 04:33:36,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29898 conditions, 4577 events. 2892/4577 cut-off events. For 222077/222077 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 26579 event pairs, 735 based on Foata normal form. 2/4578 useless extension candidates. Maximal degree in co-relation 29784. Up to 4222 conditions per place. [2024-06-28 04:33:36,767 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 296 selfloop transitions, 76 changer transitions 0/377 dead transitions. [2024-06-28 04:33:36,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 377 transitions, 5520 flow [2024-06-28 04:33:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:33:36,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:33:36,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-28 04:33:36,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 04:33:36,769 INFO L175 Difference]: Start difference. First operand has 253 places, 350 transitions, 4702 flow. Second operand 9 states and 153 transitions. [2024-06-28 04:33:36,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 377 transitions, 5520 flow [2024-06-28 04:33:37,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 377 transitions, 5281 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-28 04:33:37,301 INFO L231 Difference]: Finished difference. Result has 258 places, 350 transitions, 4621 flow [2024-06-28 04:33:37,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4463, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4621, PETRI_PLACES=258, PETRI_TRANSITIONS=350} [2024-06-28 04:33:37,302 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-28 04:33:37,302 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 350 transitions, 4621 flow [2024-06-28 04:33:37,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:37,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:37,302 INFO 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 04:33:37,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 04:33:37,302 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 04:33:37,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:37,303 INFO L85 PathProgramCache]: Analyzing trace with hash -901854193, now seen corresponding path program 5 times [2024-06-28 04:33:37,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:37,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947259853] [2024-06-28 04:33:37,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:37,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:39,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:33:39,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:39,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947259853] [2024-06-28 04:33:39,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947259853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:39,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:39,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:33:39,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924934445] [2024-06-28 04:33:39,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:39,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:33:39,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:39,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:33:39,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:33:39,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:33:39,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 350 transitions, 4621 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:39,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:39,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:33:39,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:41,420 INFO L124 PetriNetUnfolderBase]: 2979/4725 cut-off events. [2024-06-28 04:33:41,421 INFO L125 PetriNetUnfolderBase]: For 233888/233888 co-relation queries the response was YES. [2024-06-28 04:33:41,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30576 conditions, 4725 events. 2979/4725 cut-off events. For 233888/233888 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 27700 event pairs, 755 based on Foata normal form. 2/4726 useless extension candidates. Maximal degree in co-relation 30461. Up to 4306 conditions per place. [2024-06-28 04:33:41,467 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 326 selfloop transitions, 79 changer transitions 0/410 dead transitions. [2024-06-28 04:33:41,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 410 transitions, 5962 flow [2024-06-28 04:33:41,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:33:41,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:33:41,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-28 04:33:41,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-28 04:33:41,468 INFO L175 Difference]: Start difference. First operand has 258 places, 350 transitions, 4621 flow. Second operand 9 states and 165 transitions. [2024-06-28 04:33:41,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 410 transitions, 5962 flow [2024-06-28 04:33:42,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 410 transitions, 5798 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 04:33:42,024 INFO L231 Difference]: Finished difference. Result has 262 places, 368 transitions, 4962 flow [2024-06-28 04:33:42,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4469, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4962, PETRI_PLACES=262, PETRI_TRANSITIONS=368} [2024-06-28 04:33:42,024 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-28 04:33:42,025 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 368 transitions, 4962 flow [2024-06-28 04:33:42,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:42,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:42,025 INFO 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 04:33:42,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 04:33:42,025 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 04:33:42,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:42,026 INFO L85 PathProgramCache]: Analyzing trace with hash -893543713, now seen corresponding path program 6 times [2024-06-28 04:33:42,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:42,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864427219] [2024-06-28 04:33:42,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:42,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:44,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:33:44,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:44,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864427219] [2024-06-28 04:33:44,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864427219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:44,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:44,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:33:44,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573857185] [2024-06-28 04:33:44,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:44,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:33:44,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:44,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:33:44,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:33:44,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:33:44,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 368 transitions, 4962 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:44,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:44,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:33:44,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:46,172 INFO L124 PetriNetUnfolderBase]: 2974/4722 cut-off events. [2024-06-28 04:33:46,173 INFO L125 PetriNetUnfolderBase]: For 237389/237389 co-relation queries the response was YES. [2024-06-28 04:33:46,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30878 conditions, 4722 events. 2974/4722 cut-off events. For 237389/237389 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 27679 event pairs, 767 based on Foata normal form. 2/4723 useless extension candidates. Maximal degree in co-relation 30760. Up to 4366 conditions per place. [2024-06-28 04:33:46,225 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 323 selfloop transitions, 74 changer transitions 0/402 dead transitions. [2024-06-28 04:33:46,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 402 transitions, 5871 flow [2024-06-28 04:33:46,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:33:46,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:33:46,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-28 04:33:46,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-28 04:33:46,227 INFO L175 Difference]: Start difference. First operand has 262 places, 368 transitions, 4962 flow. Second operand 9 states and 156 transitions. [2024-06-28 04:33:46,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 402 transitions, 5871 flow [2024-06-28 04:33:46,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 402 transitions, 5671 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-28 04:33:46,775 INFO L231 Difference]: Finished difference. Result has 266 places, 369 transitions, 4948 flow [2024-06-28 04:33:46,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4762, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4948, PETRI_PLACES=266, PETRI_TRANSITIONS=369} [2024-06-28 04:33:46,775 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-28 04:33:46,775 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 369 transitions, 4948 flow [2024-06-28 04:33:46,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:46,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:46,776 INFO 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 04:33:46,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 04:33:46,776 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 04:33:46,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:46,776 INFO L85 PathProgramCache]: Analyzing trace with hash 819648479, now seen corresponding path program 7 times [2024-06-28 04:33:46,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:46,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384385398] [2024-06-28 04:33:46,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:46,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:48,966 INFO 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 04:33:48,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:48,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384385398] [2024-06-28 04:33:48,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384385398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:48,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:48,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:33:48,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985989006] [2024-06-28 04:33:48,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:48,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:33:48,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:48,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:33:48,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:33:48,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:33:48,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 369 transitions, 4948 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:48,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:48,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:33:48,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:50,452 INFO L124 PetriNetUnfolderBase]: 3026/4804 cut-off events. [2024-06-28 04:33:50,453 INFO L125 PetriNetUnfolderBase]: For 243693/243693 co-relation queries the response was YES. [2024-06-28 04:33:50,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31262 conditions, 4804 events. 3026/4804 cut-off events. For 243693/243693 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 28091 event pairs, 644 based on Foata normal form. 2/4805 useless extension candidates. Maximal degree in co-relation 31144. Up to 4209 conditions per place. [2024-06-28 04:33:50,502 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 316 selfloop transitions, 99 changer transitions 0/420 dead transitions. [2024-06-28 04:33:50,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 420 transitions, 6185 flow [2024-06-28 04:33:50,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:33:50,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:33:50,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-28 04:33:50,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 04:33:50,503 INFO L175 Difference]: Start difference. First operand has 266 places, 369 transitions, 4948 flow. Second operand 9 states and 162 transitions. [2024-06-28 04:33:50,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 420 transitions, 6185 flow [2024-06-28 04:33:51,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 420 transitions, 6048 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-28 04:33:51,177 INFO L231 Difference]: Finished difference. Result has 271 places, 380 transitions, 5231 flow [2024-06-28 04:33:51,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4811, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5231, PETRI_PLACES=271, PETRI_TRANSITIONS=380} [2024-06-28 04:33:51,177 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-28 04:33:51,177 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 380 transitions, 5231 flow [2024-06-28 04:33:51,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:51,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:51,178 INFO 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 04:33:51,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 04:33:51,178 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 04:33:51,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:51,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1622463455, now seen corresponding path program 5 times [2024-06-28 04:33:51,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:51,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233083923] [2024-06-28 04:33:51,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:51,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:33:53,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:53,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233083923] [2024-06-28 04:33:53,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233083923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:53,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:53,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:33:53,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007899940] [2024-06-28 04:33:53,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:53,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:33:53,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:53,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:33:53,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:33:53,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:33:53,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 380 transitions, 5231 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:53,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:53,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:33:53,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:55,547 INFO L124 PetriNetUnfolderBase]: 3118/4938 cut-off events. [2024-06-28 04:33:55,548 INFO L125 PetriNetUnfolderBase]: For 258052/258052 co-relation queries the response was YES. [2024-06-28 04:33:55,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32830 conditions, 4938 events. 3118/4938 cut-off events. For 258052/258052 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 29131 event pairs, 765 based on Foata normal form. 2/4939 useless extension candidates. Maximal degree in co-relation 32709. Up to 4394 conditions per place. [2024-06-28 04:33:55,602 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 332 selfloop transitions, 116 changer transitions 0/453 dead transitions. [2024-06-28 04:33:55,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 453 transitions, 6868 flow [2024-06-28 04:33:55,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:33:55,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:33:55,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-28 04:33:55,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329004329004329 [2024-06-28 04:33:55,604 INFO L175 Difference]: Start difference. First operand has 271 places, 380 transitions, 5231 flow. Second operand 11 states and 200 transitions. [2024-06-28 04:33:55,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 453 transitions, 6868 flow [2024-06-28 04:33:56,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 453 transitions, 6704 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-28 04:33:56,284 INFO L231 Difference]: Finished difference. Result has 280 places, 402 transitions, 5695 flow [2024-06-28 04:33:56,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5077, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5695, PETRI_PLACES=280, PETRI_TRANSITIONS=402} [2024-06-28 04:33:56,285 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-28 04:33:56,285 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 402 transitions, 5695 flow [2024-06-28 04:33:56,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:56,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:56,285 INFO 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 04:33:56,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 04:33:56,285 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 04:33:56,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:56,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1496815145, now seen corresponding path program 1 times [2024-06-28 04:33:56,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:56,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471580305] [2024-06-28 04:33:56,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:56,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:56,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:59,042 INFO 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 04:33:59,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:59,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471580305] [2024-06-28 04:33:59,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471580305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:59,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:59,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:33:59,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626011170] [2024-06-28 04:33:59,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:59,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:33:59,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:59,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:33:59,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:33:59,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:33:59,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 402 transitions, 5695 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:59,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:59,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:33:59,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:00,830 INFO L124 PetriNetUnfolderBase]: 3159/5023 cut-off events. [2024-06-28 04:34:00,831 INFO L125 PetriNetUnfolderBase]: For 270280/270282 co-relation queries the response was YES. [2024-06-28 04:34:00,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33846 conditions, 5023 events. 3159/5023 cut-off events. For 270280/270282 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 29716 event pairs, 686 based on Foata normal form. 4/5026 useless extension candidates. Maximal degree in co-relation 33721. Up to 4491 conditions per place. [2024-06-28 04:34:00,887 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 369 selfloop transitions, 76 changer transitions 0/450 dead transitions. [2024-06-28 04:34:00,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 450 transitions, 6952 flow [2024-06-28 04:34:00,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:34:00,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:34:00,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 04:34:00,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-28 04:34:00,889 INFO L175 Difference]: Start difference. First operand has 280 places, 402 transitions, 5695 flow. Second operand 9 states and 166 transitions. [2024-06-28 04:34:00,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 450 transitions, 6952 flow [2024-06-28 04:34:01,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 450 transitions, 6683 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-28 04:34:01,600 INFO L231 Difference]: Finished difference. Result has 283 places, 408 transitions, 5680 flow [2024-06-28 04:34:01,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5426, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5680, PETRI_PLACES=283, PETRI_TRANSITIONS=408} [2024-06-28 04:34:01,601 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-28 04:34:01,601 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 408 transitions, 5680 flow [2024-06-28 04:34:01,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:01,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:01,601 INFO 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 04:34:01,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 04:34:01,602 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 04:34:01,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:01,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1496875595, now seen corresponding path program 2 times [2024-06-28 04:34:01,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:01,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147342678] [2024-06-28 04:34:01,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:01,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:01,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:34:04,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:04,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147342678] [2024-06-28 04:34:04,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147342678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:04,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:04,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:34:04,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40121172] [2024-06-28 04:34:04,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:04,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:34:04,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:04,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:34:04,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:34:04,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:34:04,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 408 transitions, 5680 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:04,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:04,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:34:04,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:06,291 INFO L124 PetriNetUnfolderBase]: 3167/5041 cut-off events. [2024-06-28 04:34:06,292 INFO L125 PetriNetUnfolderBase]: For 276584/276586 co-relation queries the response was YES. [2024-06-28 04:34:06,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34002 conditions, 5041 events. 3167/5041 cut-off events. For 276584/276586 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 29923 event pairs, 694 based on Foata normal form. 4/5044 useless extension candidates. Maximal degree in co-relation 33875. Up to 4538 conditions per place. [2024-06-28 04:34:06,352 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 369 selfloop transitions, 73 changer transitions 0/447 dead transitions. [2024-06-28 04:34:06,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 447 transitions, 6735 flow [2024-06-28 04:34:06,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:34:06,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:34:06,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-28 04:34:06,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-28 04:34:06,353 INFO L175 Difference]: Start difference. First operand has 283 places, 408 transitions, 5680 flow. Second operand 9 states and 161 transitions. [2024-06-28 04:34:06,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 447 transitions, 6735 flow [2024-06-28 04:34:07,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 447 transitions, 6583 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-28 04:34:07,185 INFO L231 Difference]: Finished difference. Result has 287 places, 410 transitions, 5725 flow [2024-06-28 04:34:07,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5546, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5725, PETRI_PLACES=287, PETRI_TRANSITIONS=410} [2024-06-28 04:34:07,186 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-28 04:34:07,186 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 410 transitions, 5725 flow [2024-06-28 04:34:07,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:07,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:07,186 INFO 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 04:34:07,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 04:34:07,187 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 04:34:07,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:07,187 INFO L85 PathProgramCache]: Analyzing trace with hash 457419301, now seen corresponding path program 3 times [2024-06-28 04:34:07,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:07,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810253154] [2024-06-28 04:34:07,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:07,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:07,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:10,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:34:10,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:10,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810253154] [2024-06-28 04:34:10,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810253154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:10,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:10,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:34:10,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279294809] [2024-06-28 04:34:10,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:10,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:34:10,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:10,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:34:10,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:34:10,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:34:10,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 410 transitions, 5725 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:10,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:10,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:34:10,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:11,971 INFO L124 PetriNetUnfolderBase]: 3198/5051 cut-off events. [2024-06-28 04:34:11,972 INFO L125 PetriNetUnfolderBase]: For 303107/303107 co-relation queries the response was YES. [2024-06-28 04:34:12,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34375 conditions, 5051 events. 3198/5051 cut-off events. For 303107/303107 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 29806 event pairs, 779 based on Foata normal form. 12/5062 useless extension candidates. Maximal degree in co-relation 34246. Up to 4624 conditions per place. [2024-06-28 04:34:12,032 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 352 selfloop transitions, 85 changer transitions 0/442 dead transitions. [2024-06-28 04:34:12,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 442 transitions, 6753 flow [2024-06-28 04:34:12,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:34:12,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:34:12,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-28 04:34:12,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-28 04:34:12,034 INFO L175 Difference]: Start difference. First operand has 287 places, 410 transitions, 5725 flow. Second operand 9 states and 156 transitions. [2024-06-28 04:34:12,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 442 transitions, 6753 flow [2024-06-28 04:34:12,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 442 transitions, 6584 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-28 04:34:12,723 INFO L231 Difference]: Finished difference. Result has 289 places, 411 transitions, 5760 flow [2024-06-28 04:34:12,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5556, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5760, PETRI_PLACES=289, PETRI_TRANSITIONS=411} [2024-06-28 04:34:12,724 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-28 04:34:12,724 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 411 transitions, 5760 flow [2024-06-28 04:34:12,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:12,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:12,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:34:12,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 04:34:12,724 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 04:34:12,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:12,725 INFO L85 PathProgramCache]: Analyzing trace with hash 634692865, now seen corresponding path program 8 times [2024-06-28 04:34:12,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:12,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889365400] [2024-06-28 04:34:12,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:12,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:12,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:15,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:34:15,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:15,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889365400] [2024-06-28 04:34:15,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889365400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:15,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:15,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:34:15,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145504357] [2024-06-28 04:34:15,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:15,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:34:15,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:15,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:34:15,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:34:15,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:34:15,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 411 transitions, 5760 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:15,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:15,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:34:15,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:17,044 INFO L124 PetriNetUnfolderBase]: 3206/5074 cut-off events. [2024-06-28 04:34:17,044 INFO L125 PetriNetUnfolderBase]: For 286370/286370 co-relation queries the response was YES. [2024-06-28 04:34:17,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34573 conditions, 5074 events. 3206/5074 cut-off events. For 286370/286370 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 29846 event pairs, 683 based on Foata normal form. 2/5075 useless extension candidates. Maximal degree in co-relation 34443. Up to 4471 conditions per place. [2024-06-28 04:34:17,110 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 339 selfloop transitions, 102 changer transitions 0/446 dead transitions. [2024-06-28 04:34:17,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 446 transitions, 6938 flow [2024-06-28 04:34:17,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:34:17,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:34:17,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 04:34:17,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 04:34:17,111 INFO L175 Difference]: Start difference. First operand has 289 places, 411 transitions, 5760 flow. Second operand 8 states and 144 transitions. [2024-06-28 04:34:17,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 446 transitions, 6938 flow [2024-06-28 04:34:17,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 446 transitions, 6768 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-28 04:34:17,875 INFO L231 Difference]: Finished difference. Result has 290 places, 413 transitions, 5859 flow [2024-06-28 04:34:17,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5590, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5859, PETRI_PLACES=290, PETRI_TRANSITIONS=413} [2024-06-28 04:34:17,876 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-28 04:34:17,876 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 413 transitions, 5859 flow [2024-06-28 04:34:17,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:17,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:17,876 INFO 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 04:34:17,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 04:34:17,877 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 04:34:17,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:17,877 INFO L85 PathProgramCache]: Analyzing trace with hash -25823693, now seen corresponding path program 9 times [2024-06-28 04:34:17,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:17,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253215369] [2024-06-28 04:34:17,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:17,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:17,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:20,872 INFO 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 04:34:20,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:20,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253215369] [2024-06-28 04:34:20,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253215369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:20,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:20,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:34:20,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020712382] [2024-06-28 04:34:20,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:20,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:34:20,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:20,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:34:20,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:34:20,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:34:20,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 413 transitions, 5859 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:20,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:20,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:34:20,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:22,620 INFO L124 PetriNetUnfolderBase]: 3219/5099 cut-off events. [2024-06-28 04:34:22,620 INFO L125 PetriNetUnfolderBase]: For 294107/294107 co-relation queries the response was YES. [2024-06-28 04:34:22,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35040 conditions, 5099 events. 3219/5099 cut-off events. For 294107/294107 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 30244 event pairs, 807 based on Foata normal form. 2/5100 useless extension candidates. Maximal degree in co-relation 34909. Up to 4720 conditions per place. [2024-06-28 04:34:22,682 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 359 selfloop transitions, 81 changer transitions 0/445 dead transitions. [2024-06-28 04:34:22,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 445 transitions, 6943 flow [2024-06-28 04:34:22,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:34:22,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:34:22,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-28 04:34:22,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-28 04:34:22,684 INFO L175 Difference]: Start difference. First operand has 290 places, 413 transitions, 5859 flow. Second operand 8 states and 138 transitions. [2024-06-28 04:34:22,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 445 transitions, 6943 flow [2024-06-28 04:34:23,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 445 transitions, 6745 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-28 04:34:23,351 INFO L231 Difference]: Finished difference. Result has 291 places, 418 transitions, 5957 flow [2024-06-28 04:34:23,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5668, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5957, PETRI_PLACES=291, PETRI_TRANSITIONS=418} [2024-06-28 04:34:23,352 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-28 04:34:23,352 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 418 transitions, 5957 flow [2024-06-28 04:34:23,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:23,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:23,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:34:23,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 04:34:23,352 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 04:34:23,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:23,353 INFO L85 PathProgramCache]: Analyzing trace with hash 536036915, now seen corresponding path program 10 times [2024-06-28 04:34:23,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:23,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475974701] [2024-06-28 04:34:23,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:23,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:23,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:26,864 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 04:34:26,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:26,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475974701] [2024-06-28 04:34:26,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475974701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:26,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:26,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:34:26,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588212425] [2024-06-28 04:34:26,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:26,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:34:26,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:26,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:34:26,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:34:26,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:34:26,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 418 transitions, 5957 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:26,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:26,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:34:26,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:28,611 INFO L124 PetriNetUnfolderBase]: 3227/5102 cut-off events. [2024-06-28 04:34:28,611 INFO L125 PetriNetUnfolderBase]: For 280718/280718 co-relation queries the response was YES. [2024-06-28 04:34:28,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34824 conditions, 5102 events. 3227/5102 cut-off events. For 280718/280718 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 30178 event pairs, 791 based on Foata normal form. 2/5103 useless extension candidates. Maximal degree in co-relation 34694. Up to 4746 conditions per place. [2024-06-28 04:34:28,662 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 359 selfloop transitions, 77 changer transitions 0/441 dead transitions. [2024-06-28 04:34:28,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 441 transitions, 6960 flow [2024-06-28 04:34:28,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:34:28,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:34:28,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 04:34:28,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-28 04:34:28,664 INFO L175 Difference]: Start difference. First operand has 291 places, 418 transitions, 5957 flow. Second operand 8 states and 131 transitions. [2024-06-28 04:34:28,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 441 transitions, 6960 flow [2024-06-28 04:34:29,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 441 transitions, 6849 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-28 04:34:29,365 INFO L231 Difference]: Finished difference. Result has 295 places, 421 transitions, 6117 flow [2024-06-28 04:34:29,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5846, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6117, PETRI_PLACES=295, PETRI_TRANSITIONS=421} [2024-06-28 04:34:29,366 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-28 04:34:29,366 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 421 transitions, 6117 flow [2024-06-28 04:34:29,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:29,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:29,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:34:29,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 04:34:29,367 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 04:34:29,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:29,367 INFO L85 PathProgramCache]: Analyzing trace with hash -267947071, now seen corresponding path program 6 times [2024-06-28 04:34:29,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:29,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174638654] [2024-06-28 04:34:29,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:29,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:32,289 INFO 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 04:34:32,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:32,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174638654] [2024-06-28 04:34:32,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174638654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:32,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:32,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:34:32,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662405742] [2024-06-28 04:34:32,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:32,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:34:32,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:32,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:34:32,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:34:32,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:34:32,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 421 transitions, 6117 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:32,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:32,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:34:32,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:34,020 INFO L124 PetriNetUnfolderBase]: 3215/5095 cut-off events. [2024-06-28 04:34:34,021 INFO L125 PetriNetUnfolderBase]: For 271067/271067 co-relation queries the response was YES. [2024-06-28 04:34:34,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34391 conditions, 5095 events. 3215/5095 cut-off events. For 271067/271067 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 30325 event pairs, 772 based on Foata normal form. 4/5098 useless extension candidates. Maximal degree in co-relation 34261. Up to 4548 conditions per place. [2024-06-28 04:34:34,076 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 331 selfloop transitions, 117 changer transitions 0/453 dead transitions. [2024-06-28 04:34:34,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 453 transitions, 7123 flow [2024-06-28 04:34:34,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:34:34,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:34:34,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 04:34:34,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-28 04:34:34,078 INFO L175 Difference]: Start difference. First operand has 295 places, 421 transitions, 6117 flow. Second operand 8 states and 145 transitions. [2024-06-28 04:34:34,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 453 transitions, 7123 flow [2024-06-28 04:34:34,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 453 transitions, 6962 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-28 04:34:34,859 INFO L231 Difference]: Finished difference. Result has 298 places, 421 transitions, 6214 flow [2024-06-28 04:34:34,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5956, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6214, PETRI_PLACES=298, PETRI_TRANSITIONS=421} [2024-06-28 04:34:34,860 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-28 04:34:34,860 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 421 transitions, 6214 flow [2024-06-28 04:34:34,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:34,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:34,860 INFO 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 04:34:34,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 04:34:34,861 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 04:34:34,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:34,861 INFO L85 PathProgramCache]: Analyzing trace with hash 84708853, now seen corresponding path program 7 times [2024-06-28 04:34:34,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:34,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542422530] [2024-06-28 04:34:34,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:34,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:34,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:37,652 INFO 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 04:34:37,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:37,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542422530] [2024-06-28 04:34:37,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542422530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:37,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:37,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:34:37,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402616239] [2024-06-28 04:34:37,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:37,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:34:37,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:37,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:34:37,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:34:37,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:34:37,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 421 transitions, 6214 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:37,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:37,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:34:37,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:39,511 INFO L124 PetriNetUnfolderBase]: 3267/5180 cut-off events. [2024-06-28 04:34:39,511 INFO L125 PetriNetUnfolderBase]: For 283878/283880 co-relation queries the response was YES. [2024-06-28 04:34:39,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35547 conditions, 5180 events. 3267/5180 cut-off events. For 283878/283880 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 30770 event pairs, 634 based on Foata normal form. 6/5185 useless extension candidates. Maximal degree in co-relation 35417. Up to 4184 conditions per place. [2024-06-28 04:34:39,566 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 278 selfloop transitions, 186 changer transitions 0/469 dead transitions. [2024-06-28 04:34:39,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 469 transitions, 7837 flow [2024-06-28 04:34:39,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:34:39,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:34:39,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 04:34:39,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-28 04:34:39,568 INFO L175 Difference]: Start difference. First operand has 298 places, 421 transitions, 6214 flow. Second operand 8 states and 150 transitions. [2024-06-28 04:34:39,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 469 transitions, 7837 flow [2024-06-28 04:34:40,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 469 transitions, 7626 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-28 04:34:40,453 INFO L231 Difference]: Finished difference. Result has 300 places, 433 transitions, 6676 flow [2024-06-28 04:34:40,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6007, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6676, PETRI_PLACES=300, PETRI_TRANSITIONS=433} [2024-06-28 04:34:40,454 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-28 04:34:40,454 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 433 transitions, 6676 flow [2024-06-28 04:34:40,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:40,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:40,455 INFO 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 04:34:40,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 04:34:40,455 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 04:34:40,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:40,455 INFO L85 PathProgramCache]: Analyzing trace with hash 22506433, now seen corresponding path program 8 times [2024-06-28 04:34:40,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:40,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320398518] [2024-06-28 04:34:40,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:40,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:40,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:43,220 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 04:34:43,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:43,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320398518] [2024-06-28 04:34:43,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320398518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:43,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:43,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:34:43,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583758038] [2024-06-28 04:34:43,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:43,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:34:43,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:43,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:34:43,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:34:43,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:34:43,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 433 transitions, 6676 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:43,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:43,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:34:43,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:45,150 INFO L124 PetriNetUnfolderBase]: 3271/5184 cut-off events. [2024-06-28 04:34:45,150 INFO L125 PetriNetUnfolderBase]: For 281343/281345 co-relation queries the response was YES. [2024-06-28 04:34:45,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35836 conditions, 5184 events. 3271/5184 cut-off events. For 281343/281345 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 30826 event pairs, 631 based on Foata normal form. 6/5189 useless extension candidates. Maximal degree in co-relation 35706. Up to 4189 conditions per place. [2024-06-28 04:34:45,204 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 274 selfloop transitions, 189 changer transitions 0/468 dead transitions. [2024-06-28 04:34:45,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 468 transitions, 8072 flow [2024-06-28 04:34:45,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:34:45,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:34:45,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 04:34:45,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-28 04:34:45,206 INFO L175 Difference]: Start difference. First operand has 300 places, 433 transitions, 6676 flow. Second operand 8 states and 146 transitions. [2024-06-28 04:34:45,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 468 transitions, 8072 flow [2024-06-28 04:34:46,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 468 transitions, 7611 flow, removed 95 selfloop flow, removed 6 redundant places. [2024-06-28 04:34:46,038 INFO L231 Difference]: Finished difference. Result has 302 places, 436 transitions, 6688 flow [2024-06-28 04:34:46,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6242, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6688, PETRI_PLACES=302, PETRI_TRANSITIONS=436} [2024-06-28 04:34:46,039 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-28 04:34:46,039 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 436 transitions, 6688 flow [2024-06-28 04:34:46,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:46,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:46,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:34:46,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 04:34:46,040 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 04:34:46,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:46,040 INFO L85 PathProgramCache]: Analyzing trace with hash 953423581, now seen corresponding path program 9 times [2024-06-28 04:34:46,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:46,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813441146] [2024-06-28 04:34:46,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:46,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:34:49,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:49,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813441146] [2024-06-28 04:34:49,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813441146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:49,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:49,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:34:49,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445676748] [2024-06-28 04:34:49,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:49,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:34:49,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:49,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:34:49,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:34:49,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:34:49,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 436 transitions, 6688 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:49,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:49,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:34:49,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:50,995 INFO L124 PetriNetUnfolderBase]: 3281/5194 cut-off events. [2024-06-28 04:34:50,995 INFO L125 PetriNetUnfolderBase]: For 277046/277046 co-relation queries the response was YES. [2024-06-28 04:34:51,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35698 conditions, 5194 events. 3281/5194 cut-off events. For 277046/277046 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 30992 event pairs, 792 based on Foata normal form. 2/5195 useless extension candidates. Maximal degree in co-relation 35569. Up to 4772 conditions per place. [2024-06-28 04:34:51,056 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 360 selfloop transitions, 95 changer transitions 0/460 dead transitions. [2024-06-28 04:34:51,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 460 transitions, 7724 flow [2024-06-28 04:34:51,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:34:51,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:34:51,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 04:34:51,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-28 04:34:51,057 INFO L175 Difference]: Start difference. First operand has 302 places, 436 transitions, 6688 flow. Second operand 8 states and 134 transitions. [2024-06-28 04:34:51,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 460 transitions, 7724 flow [2024-06-28 04:34:51,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 460 transitions, 7340 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-28 04:34:51,930 INFO L231 Difference]: Finished difference. Result has 303 places, 439 transitions, 6570 flow [2024-06-28 04:34:51,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6307, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6570, PETRI_PLACES=303, PETRI_TRANSITIONS=439} [2024-06-28 04:34:51,931 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-28 04:34:51,931 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 439 transitions, 6570 flow [2024-06-28 04:34:51,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:51,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:51,931 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 04:34:51,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 04:34:51,931 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 04:34:51,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:51,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1450364959, now seen corresponding path program 11 times [2024-06-28 04:34:51,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:51,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445205569] [2024-06-28 04:34:51,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:51,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:55,468 INFO 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 04:34:55,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:55,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445205569] [2024-06-28 04:34:55,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445205569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:55,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:55,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:34:55,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043104738] [2024-06-28 04:34:55,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:55,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:34:55,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:55,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:34:55,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:34:55,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:34:55,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 439 transitions, 6570 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:55,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:55,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:34:55,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:57,100 INFO L124 PetriNetUnfolderBase]: 3276/5179 cut-off events. [2024-06-28 04:34:57,100 INFO L125 PetriNetUnfolderBase]: For 270999/270999 co-relation queries the response was YES. [2024-06-28 04:34:57,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35010 conditions, 5179 events. 3276/5179 cut-off events. For 270999/270999 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 30731 event pairs, 818 based on Foata normal form. 2/5173 useless extension candidates. Maximal degree in co-relation 34881. Up to 4823 conditions per place. [2024-06-28 04:34:57,163 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 374 selfloop transitions, 73 changer transitions 0/452 dead transitions. [2024-06-28 04:34:57,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 452 transitions, 7502 flow [2024-06-28 04:34:57,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:34:57,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:34:57,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-28 04:34:57,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-28 04:34:57,165 INFO L175 Difference]: Start difference. First operand has 303 places, 439 transitions, 6570 flow. Second operand 8 states and 123 transitions. [2024-06-28 04:34:57,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 452 transitions, 7502 flow [2024-06-28 04:34:57,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 452 transitions, 7256 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-28 04:34:57,805 INFO L231 Difference]: Finished difference. Result has 304 places, 439 transitions, 6475 flow [2024-06-28 04:34:57,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6324, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6475, PETRI_PLACES=304, PETRI_TRANSITIONS=439} [2024-06-28 04:34:57,805 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-28 04:34:57,806 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 439 transitions, 6475 flow [2024-06-28 04:34:57,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:57,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:57,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:34:57,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 04:34:57,807 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 04:34:57,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:57,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1974843859, now seen corresponding path program 10 times [2024-06-28 04:34:57,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:57,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854310167] [2024-06-28 04:34:57,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:57,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:35:01,122 INFO 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 04:35:01,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:35:01,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854310167] [2024-06-28 04:35:01,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854310167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:35:01,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:35:01,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:35:01,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181681384] [2024-06-28 04:35:01,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:35:01,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:35:01,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:35:01,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:35:01,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:35:01,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:35:01,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 439 transitions, 6475 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:01,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:35:01,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:35:01,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:35:02,880 INFO L124 PetriNetUnfolderBase]: 3296/5227 cut-off events. [2024-06-28 04:35:02,881 INFO L125 PetriNetUnfolderBase]: For 276645/276645 co-relation queries the response was YES. [2024-06-28 04:35:02,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35112 conditions, 5227 events. 3296/5227 cut-off events. For 276645/276645 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 31134 event pairs, 645 based on Foata normal form. 4/5223 useless extension candidates. Maximal degree in co-relation 34983. Up to 4212 conditions per place. [2024-06-28 04:35:02,947 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 277 selfloop transitions, 193 changer transitions 0/475 dead transitions. [2024-06-28 04:35:02,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 475 transitions, 7938 flow [2024-06-28 04:35:02,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:35:02,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:35:02,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 04:35:02,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-28 04:35:02,949 INFO L175 Difference]: Start difference. First operand has 304 places, 439 transitions, 6475 flow. Second operand 8 states and 145 transitions. [2024-06-28 04:35:02,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 475 transitions, 7938 flow [2024-06-28 04:35:03,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 475 transitions, 7658 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-28 04:35:03,755 INFO L231 Difference]: Finished difference. Result has 304 places, 445 transitions, 6732 flow [2024-06-28 04:35:03,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6195, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6732, PETRI_PLACES=304, PETRI_TRANSITIONS=445} [2024-06-28 04:35:03,756 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-28 04:35:03,756 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 445 transitions, 6732 flow [2024-06-28 04:35:03,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:03,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:35:03,757 INFO 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 04:35:03,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 04:35:03,757 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 04:35:03,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:35:03,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1893238823, now seen corresponding path program 11 times [2024-06-28 04:35:03,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:35:03,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251504690] [2024-06-28 04:35:03,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:35:03,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:35:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:35:06,796 INFO 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 04:35:06,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:35:06,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251504690] [2024-06-28 04:35:06,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251504690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:35:06,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:35:06,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:35:06,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066283231] [2024-06-28 04:35:06,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:35:06,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:35:06,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:35:06,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:35:06,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:35:06,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:35:06,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 445 transitions, 6732 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:06,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:35:06,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:35:06,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:35:08,661 INFO L124 PetriNetUnfolderBase]: 3300/5237 cut-off events. [2024-06-28 04:35:08,661 INFO L125 PetriNetUnfolderBase]: For 279258/279258 co-relation queries the response was YES. [2024-06-28 04:35:08,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35549 conditions, 5237 events. 3300/5237 cut-off events. For 279258/279258 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 31228 event pairs, 643 based on Foata normal form. 4/5233 useless extension candidates. Maximal degree in co-relation 35420. Up to 4217 conditions per place. [2024-06-28 04:35:08,717 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 277 selfloop transitions, 193 changer transitions 0/475 dead transitions. [2024-06-28 04:35:08,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 475 transitions, 8129 flow [2024-06-28 04:35:08,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:35:08,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:35:08,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 04:35:08,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-28 04:35:08,720 INFO L175 Difference]: Start difference. First operand has 304 places, 445 transitions, 6732 flow. Second operand 8 states and 142 transitions. [2024-06-28 04:35:08,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 475 transitions, 8129 flow [2024-06-28 04:35:09,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 475 transitions, 7483 flow, removed 96 selfloop flow, removed 6 redundant places. [2024-06-28 04:35:09,489 INFO L231 Difference]: Finished difference. Result has 306 places, 448 transitions, 6562 flow [2024-06-28 04:35:09,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6112, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6562, PETRI_PLACES=306, PETRI_TRANSITIONS=448} [2024-06-28 04:35:09,490 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-28 04:35:09,490 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 448 transitions, 6562 flow [2024-06-28 04:35:09,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:09,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:35:09,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:35:09,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 04:35:09,490 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 04:35:09,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:35:09,491 INFO L85 PathProgramCache]: Analyzing trace with hash -755481025, now seen corresponding path program 12 times [2024-06-28 04:35:09,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:35:09,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756566742] [2024-06-28 04:35:09,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:35:09,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:35:09,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:35:12,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:35:12,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:35:12,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756566742] [2024-06-28 04:35:12,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756566742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:35:12,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:35:12,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:35:12,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680964647] [2024-06-28 04:35:12,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:35:12,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:35:12,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:35:12,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:35:12,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:35:12,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:35:12,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 448 transitions, 6562 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:12,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:35:12,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:35:12,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:35:14,018 INFO L124 PetriNetUnfolderBase]: 3310/5243 cut-off events. [2024-06-28 04:35:14,018 INFO L125 PetriNetUnfolderBase]: For 276629/276629 co-relation queries the response was YES. [2024-06-28 04:35:14,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35434 conditions, 5243 events. 3310/5243 cut-off events. For 276629/276629 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 31233 event pairs, 626 based on Foata normal form. 2/5237 useless extension candidates. Maximal degree in co-relation 35304. Up to 4227 conditions per place. [2024-06-28 04:35:14,075 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 265 selfloop transitions, 202 changer transitions 0/472 dead transitions. [2024-06-28 04:35:14,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 472 transitions, 7762 flow [2024-06-28 04:35:14,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:35:14,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:35:14,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 04:35:14,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 04:35:14,076 INFO L175 Difference]: Start difference. First operand has 306 places, 448 transitions, 6562 flow. Second operand 8 states and 136 transitions. [2024-06-28 04:35:14,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 472 transitions, 7762 flow [2024-06-28 04:35:14,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 472 transitions, 7278 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-28 04:35:14,843 INFO L231 Difference]: Finished difference. Result has 308 places, 451 transitions, 6548 flow [2024-06-28 04:35:14,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6081, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6548, PETRI_PLACES=308, PETRI_TRANSITIONS=451} [2024-06-28 04:35:14,843 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-28 04:35:14,844 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 451 transitions, 6548 flow [2024-06-28 04:35:14,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:14,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:35:14,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:35:14,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 04:35:14,844 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 04:35:14,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:35:14,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1398212355, now seen corresponding path program 13 times [2024-06-28 04:35:14,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:35:14,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909852469] [2024-06-28 04:35:14,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:35:14,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:35:14,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:35:17,727 INFO 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 04:35:17,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:35:17,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909852469] [2024-06-28 04:35:17,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909852469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:35:17,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:35:17,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:35:17,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458560070] [2024-06-28 04:35:17,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:35:17,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:35:17,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:35:17,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:35:17,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:35:17,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:35:17,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 451 transitions, 6548 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:17,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:35:17,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:35:17,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:35:19,325 INFO L124 PetriNetUnfolderBase]: 3304/5235 cut-off events. [2024-06-28 04:35:19,325 INFO L125 PetriNetUnfolderBase]: For 275297/275297 co-relation queries the response was YES. [2024-06-28 04:35:19,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35229 conditions, 5235 events. 3304/5235 cut-off events. For 275297/275297 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 31251 event pairs, 804 based on Foata normal form. 2/5229 useless extension candidates. Maximal degree in co-relation 35098. Up to 4760 conditions per place. [2024-06-28 04:35:19,384 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 351 selfloop transitions, 111 changer transitions 0/467 dead transitions. [2024-06-28 04:35:19,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 467 transitions, 7660 flow [2024-06-28 04:35:19,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:35:19,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:35:19,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-28 04:35:19,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-28 04:35:19,386 INFO L175 Difference]: Start difference. First operand has 308 places, 451 transitions, 6548 flow. Second operand 9 states and 140 transitions. [2024-06-28 04:35:19,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 467 transitions, 7660 flow [2024-06-28 04:35:20,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 467 transitions, 7299 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-28 04:35:20,166 INFO L231 Difference]: Finished difference. Result has 312 places, 451 transitions, 6415 flow [2024-06-28 04:35:20,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6187, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6415, PETRI_PLACES=312, PETRI_TRANSITIONS=451} [2024-06-28 04:35:20,167 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-28 04:35:20,167 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 451 transitions, 6415 flow [2024-06-28 04:35:20,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:20,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:35:20,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:35:20,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 04:35:20,168 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 04:35:20,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:35:20,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1456532189, now seen corresponding path program 14 times [2024-06-28 04:35:20,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:35:20,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530833524] [2024-06-28 04:35:20,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:35:20,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:35:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:35:23,253 INFO 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 04:35:23,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:35:23,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530833524] [2024-06-28 04:35:23,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530833524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:35:23,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:35:23,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:35:23,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593719705] [2024-06-28 04:35:23,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:35:23,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:35:23,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:35:23,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:35:23,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:35:23,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:35:23,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 451 transitions, 6415 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:23,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:35:23,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:35:23,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:35:24,998 INFO L124 PetriNetUnfolderBase]: 3298/5227 cut-off events. [2024-06-28 04:35:24,998 INFO L125 PetriNetUnfolderBase]: For 275766/275766 co-relation queries the response was YES. [2024-06-28 04:35:25,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34644 conditions, 5227 events. 3298/5227 cut-off events. For 275766/275766 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 31213 event pairs, 801 based on Foata normal form. 2/5221 useless extension candidates. Maximal degree in co-relation 34512. Up to 4755 conditions per place. [2024-06-28 04:35:25,062 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 355 selfloop transitions, 109 changer transitions 0/469 dead transitions. [2024-06-28 04:35:25,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 469 transitions, 7391 flow [2024-06-28 04:35:25,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:35:25,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:35:25,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-28 04:35:25,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2024-06-28 04:35:25,064 INFO L175 Difference]: Start difference. First operand has 312 places, 451 transitions, 6415 flow. Second operand 10 states and 156 transitions. [2024-06-28 04:35:25,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 469 transitions, 7391 flow [2024-06-28 04:35:25,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 469 transitions, 7059 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-28 04:35:25,916 INFO L231 Difference]: Finished difference. Result has 314 places, 451 transitions, 6307 flow [2024-06-28 04:35:25,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6083, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6307, PETRI_PLACES=314, PETRI_TRANSITIONS=451} [2024-06-28 04:35:25,917 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-28 04:35:25,917 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 451 transitions, 6307 flow [2024-06-28 04:35:25,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:25,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:35:25,918 INFO 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 04:35:25,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 04:35:25,918 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 04:35:25,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:35:25,919 INFO L85 PathProgramCache]: Analyzing trace with hash 651796399, now seen corresponding path program 4 times [2024-06-28 04:35:25,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:35:25,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188322919] [2024-06-28 04:35:25,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:35:25,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:35:25,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:35:28,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:35:28,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:35:28,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188322919] [2024-06-28 04:35:28,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188322919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:35:28,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:35:28,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:35:28,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538215584] [2024-06-28 04:35:28,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:35:28,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:35:28,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:35:28,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:35:28,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:35:28,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:35:28,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 451 transitions, 6307 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:28,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:35:28,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:35:28,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:35:30,583 INFO L124 PetriNetUnfolderBase]: 3319/5291 cut-off events. [2024-06-28 04:35:30,583 INFO L125 PetriNetUnfolderBase]: For 287104/287106 co-relation queries the response was YES. [2024-06-28 04:35:30,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34986 conditions, 5291 events. 3319/5291 cut-off events. For 287104/287106 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 31851 event pairs, 701 based on Foata normal form. 4/5294 useless extension candidates. Maximal degree in co-relation 34853. Up to 4677 conditions per place. [2024-06-28 04:35:30,648 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 399 selfloop transitions, 85 changer transitions 0/489 dead transitions. [2024-06-28 04:35:30,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 489 transitions, 7623 flow [2024-06-28 04:35:30,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:35:30,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:35:30,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 04:35:30,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-28 04:35:30,650 INFO L175 Difference]: Start difference. First operand has 314 places, 451 transitions, 6307 flow. Second operand 8 states and 145 transitions. [2024-06-28 04:35:30,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 489 transitions, 7623 flow [2024-06-28 04:35:31,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 489 transitions, 7232 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-28 04:35:31,412 INFO L231 Difference]: Finished difference. Result has 311 places, 455 transitions, 6178 flow [2024-06-28 04:35:31,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5916, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6178, PETRI_PLACES=311, PETRI_TRANSITIONS=455} [2024-06-28 04:35:31,413 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-28 04:35:31,413 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 455 transitions, 6178 flow [2024-06-28 04:35:31,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:31,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:35:31,414 INFO 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 04:35:31,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 04:35:31,414 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 04:35:31,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:35:31,414 INFO L85 PathProgramCache]: Analyzing trace with hash -105384995, now seen corresponding path program 5 times [2024-06-28 04:35:31,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:35:31,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227257950] [2024-06-28 04:35:31,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:35:31,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:35:31,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:35:34,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:35:34,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:35:34,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227257950] [2024-06-28 04:35:34,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227257950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:35:34,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:35:34,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:35:34,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246537333] [2024-06-28 04:35:34,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:35:34,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:35:34,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:35:34,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:35:34,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:35:34,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:35:34,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 455 transitions, 6178 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:34,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:35:34,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:35:34,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:35:36,438 INFO L124 PetriNetUnfolderBase]: 3327/5309 cut-off events. [2024-06-28 04:35:36,438 INFO L125 PetriNetUnfolderBase]: For 291730/291732 co-relation queries the response was YES. [2024-06-28 04:35:36,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35181 conditions, 5309 events. 3327/5309 cut-off events. For 291730/291732 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 32035 event pairs, 705 based on Foata normal form. 4/5312 useless extension candidates. Maximal degree in co-relation 35047. Up to 4766 conditions per place. [2024-06-28 04:35:36,503 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 404 selfloop transitions, 77 changer transitions 0/486 dead transitions. [2024-06-28 04:35:36,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 486 transitions, 7284 flow [2024-06-28 04:35:36,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:35:36,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:35:36,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-28 04:35:36,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 04:35:36,505 INFO L175 Difference]: Start difference. First operand has 311 places, 455 transitions, 6178 flow. Second operand 8 states and 140 transitions. [2024-06-28 04:35:36,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 486 transitions, 7284 flow [2024-06-28 04:35:37,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 486 transitions, 7130 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-28 04:35:37,270 INFO L231 Difference]: Finished difference. Result has 314 places, 457 transitions, 6235 flow [2024-06-28 04:35:37,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6040, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6235, PETRI_PLACES=314, PETRI_TRANSITIONS=457} [2024-06-28 04:35:37,271 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-28 04:35:37,271 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 457 transitions, 6235 flow [2024-06-28 04:35:37,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:37,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:35:37,271 INFO 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 04:35:37,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 04:35:37,272 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 04:35:37,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:35:37,272 INFO L85 PathProgramCache]: Analyzing trace with hash 540808435, now seen corresponding path program 6 times [2024-06-28 04:35:37,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:35:37,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562923001] [2024-06-28 04:35:37,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:35:37,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:35:37,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:35:40,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:35:40,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:35:40,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562923001] [2024-06-28 04:35:40,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562923001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:35:40,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:35:40,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:35:40,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391549010] [2024-06-28 04:35:40,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:35:40,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:35:40,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:35:40,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:35:40,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:35:40,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:35:40,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 457 transitions, 6235 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:40,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:35:40,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:35:40,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:35:42,409 INFO L124 PetriNetUnfolderBase]: 3445/5453 cut-off events. [2024-06-28 04:35:42,409 INFO L125 PetriNetUnfolderBase]: For 321556/321556 co-relation queries the response was YES. [2024-06-28 04:35:42,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36568 conditions, 5453 events. 3445/5453 cut-off events. For 321556/321556 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 32773 event pairs, 824 based on Foata normal form. 12/5460 useless extension candidates. Maximal degree in co-relation 36433. Up to 4946 conditions per place. [2024-06-28 04:35:42,469 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 402 selfloop transitions, 90 changer transitions 0/497 dead transitions. [2024-06-28 04:35:42,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 497 transitions, 7643 flow [2024-06-28 04:35:42,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:35:42,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:35:42,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-28 04:35:42,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-28 04:35:42,470 INFO L175 Difference]: Start difference. First operand has 314 places, 457 transitions, 6235 flow. Second operand 9 states and 148 transitions. [2024-06-28 04:35:42,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 497 transitions, 7643 flow [2024-06-28 04:35:43,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 497 transitions, 7465 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-28 04:35:43,294 INFO L231 Difference]: Finished difference. Result has 317 places, 472 transitions, 6577 flow [2024-06-28 04:35:43,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6067, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6577, PETRI_PLACES=317, PETRI_TRANSITIONS=472} [2024-06-28 04:35:43,295 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-28 04:35:43,295 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 472 transitions, 6577 flow [2024-06-28 04:35:43,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:43,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:35:43,296 INFO 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 04:35:43,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 04:35:43,296 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 04:35:43,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:35:43,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1981517043, now seen corresponding path program 7 times [2024-06-28 04:35:43,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:35:43,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650788541] [2024-06-28 04:35:43,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:35:43,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:35:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:35:46,403 INFO 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 04:35:46,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:35:46,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650788541] [2024-06-28 04:35:46,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650788541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:35:46,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:35:46,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:35:46,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385987002] [2024-06-28 04:35:46,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:35:46,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:35:46,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:35:46,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:35:46,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:35:46,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:35:46,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 472 transitions, 6577 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:46,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:35:46,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:35:46,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:35:48,082 INFO L124 PetriNetUnfolderBase]: 3466/5502 cut-off events. [2024-06-28 04:35:48,082 INFO L125 PetriNetUnfolderBase]: For 302001/302001 co-relation queries the response was YES. [2024-06-28 04:35:48,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37168 conditions, 5502 events. 3466/5502 cut-off events. For 302001/302001 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 33198 event pairs, 723 based on Foata normal form. 2/5500 useless extension candidates. Maximal degree in co-relation 37032. Up to 4936 conditions per place. [2024-06-28 04:35:48,152 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 421 selfloop transitions, 79 changer transitions 0/505 dead transitions. [2024-06-28 04:35:48,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 505 transitions, 7919 flow [2024-06-28 04:35:48,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:35:48,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:35:48,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-28 04:35:48,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 04:35:48,154 INFO L175 Difference]: Start difference. First operand has 317 places, 472 transitions, 6577 flow. Second operand 8 states and 140 transitions. [2024-06-28 04:35:48,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 505 transitions, 7919 flow [2024-06-28 04:35:48,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 505 transitions, 7751 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 04:35:48,902 INFO L231 Difference]: Finished difference. Result has 319 places, 476 transitions, 6668 flow [2024-06-28 04:35:48,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6409, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6668, PETRI_PLACES=319, PETRI_TRANSITIONS=476} [2024-06-28 04:35:48,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-28 04:35:48,903 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 476 transitions, 6668 flow [2024-06-28 04:35:48,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:48,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:35:48,903 INFO 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 04:35:48,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 04:35:48,904 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 04:35:48,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:35:48,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1343158711, now seen corresponding path program 8 times [2024-06-28 04:35:48,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:35:48,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416982848] [2024-06-28 04:35:48,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:35:48,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:35:48,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:35:52,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:35:52,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:35:52,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416982848] [2024-06-28 04:35:52,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416982848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:35:52,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:35:52,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:35:52,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761744352] [2024-06-28 04:35:52,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:35:52,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:35:52,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:35:52,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:35:52,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:35:52,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:35:52,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 476 transitions, 6668 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:52,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:35:52,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:35:52,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:35:54,329 INFO L124 PetriNetUnfolderBase]: 3474/5520 cut-off events. [2024-06-28 04:35:54,329 INFO L125 PetriNetUnfolderBase]: For 310392/310392 co-relation queries the response was YES. [2024-06-28 04:35:54,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37503 conditions, 5520 events. 3474/5520 cut-off events. For 310392/310392 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 33298 event pairs, 729 based on Foata normal form. 2/5518 useless extension candidates. Maximal degree in co-relation 37366. Up to 4989 conditions per place. [2024-06-28 04:35:54,402 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 421 selfloop transitions, 76 changer transitions 0/502 dead transitions. [2024-06-28 04:35:54,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 502 transitions, 7792 flow [2024-06-28 04:35:54,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:35:54,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:35:54,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 04:35:54,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-28 04:35:54,404 INFO L175 Difference]: Start difference. First operand has 319 places, 476 transitions, 6668 flow. Second operand 8 states and 135 transitions. [2024-06-28 04:35:54,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 502 transitions, 7792 flow [2024-06-28 04:35:55,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 502 transitions, 7616 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-28 04:35:55,271 INFO L231 Difference]: Finished difference. Result has 323 places, 478 transitions, 6704 flow [2024-06-28 04:35:55,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6516, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6704, PETRI_PLACES=323, PETRI_TRANSITIONS=478} [2024-06-28 04:35:55,272 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-28 04:35:55,272 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 478 transitions, 6704 flow [2024-06-28 04:35:55,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:55,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:35:55,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:35:55,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 04:35:55,273 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 04:35:55,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:35:55,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1628198131, now seen corresponding path program 9 times [2024-06-28 04:35:55,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:35:55,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196190730] [2024-06-28 04:35:55,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:35:55,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:35:55,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:35:58,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:35:58,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:35:58,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196190730] [2024-06-28 04:35:58,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196190730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:35:58,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:35:58,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:35:58,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388338380] [2024-06-28 04:35:58,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:35:58,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:35:58,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:35:58,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:35:58,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:35:58,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:35:58,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 478 transitions, 6704 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:58,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:35:58,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:35:58,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:36:00,345 INFO L124 PetriNetUnfolderBase]: 3482/5536 cut-off events. [2024-06-28 04:36:00,345 INFO L125 PetriNetUnfolderBase]: For 316861/316861 co-relation queries the response was YES. [2024-06-28 04:36:00,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37791 conditions, 5536 events. 3482/5536 cut-off events. For 316861/316861 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 33473 event pairs, 652 based on Foata normal form. 2/5534 useless extension candidates. Maximal degree in co-relation 37652. Up to 4754 conditions per place. [2024-06-28 04:36:00,422 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 405 selfloop transitions, 106 changer transitions 0/516 dead transitions. [2024-06-28 04:36:00,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 516 transitions, 8292 flow [2024-06-28 04:36:00,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:36:00,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:36:00,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 04:36:00,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-28 04:36:00,423 INFO L175 Difference]: Start difference. First operand has 323 places, 478 transitions, 6704 flow. Second operand 8 states and 141 transitions. [2024-06-28 04:36:00,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 516 transitions, 8292 flow [2024-06-28 04:36:01,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 516 transitions, 8126 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-28 04:36:01,321 INFO L231 Difference]: Finished difference. Result has 326 places, 486 transitions, 6970 flow [2024-06-28 04:36:01,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6538, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6970, PETRI_PLACES=326, PETRI_TRANSITIONS=486} [2024-06-28 04:36:01,321 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-28 04:36:01,321 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 486 transitions, 6970 flow [2024-06-28 04:36:01,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:01,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:36:01,322 INFO 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 04:36:01,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 04:36:01,322 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 04:36:01,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:36:01,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1639625971, now seen corresponding path program 10 times [2024-06-28 04:36:01,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:36:01,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106340809] [2024-06-28 04:36:01,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:36:01,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:36:01,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:36:04,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:36:04,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:36:04,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106340809] [2024-06-28 04:36:04,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106340809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:36:04,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:36:04,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:36:04,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700331054] [2024-06-28 04:36:04,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:36:04,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:36:04,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:36:04,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:36:04,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:36:04,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:36:04,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 486 transitions, 6970 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:04,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:36:04,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:36:04,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:36:06,695 INFO L124 PetriNetUnfolderBase]: 3490/5552 cut-off events. [2024-06-28 04:36:06,695 INFO L125 PetriNetUnfolderBase]: For 325922/325922 co-relation queries the response was YES. [2024-06-28 04:36:06,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38463 conditions, 5552 events. 3490/5552 cut-off events. For 325922/325922 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 33605 event pairs, 653 based on Foata normal form. 2/5550 useless extension candidates. Maximal degree in co-relation 38322. Up to 4762 conditions per place. [2024-06-28 04:36:06,766 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 399 selfloop transitions, 110 changer transitions 0/514 dead transitions. [2024-06-28 04:36:06,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 514 transitions, 8309 flow [2024-06-28 04:36:06,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:36:06,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:36:06,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 04:36:06,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 04:36:06,767 INFO L175 Difference]: Start difference. First operand has 326 places, 486 transitions, 6970 flow. Second operand 8 states and 136 transitions. [2024-06-28 04:36:06,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 514 transitions, 8309 flow [2024-06-28 04:36:07,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 514 transitions, 8099 flow, removed 65 selfloop flow, removed 3 redundant places. [2024-06-28 04:36:07,766 INFO L231 Difference]: Finished difference. Result has 331 places, 489 transitions, 7068 flow [2024-06-28 04:36:07,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6796, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7068, PETRI_PLACES=331, PETRI_TRANSITIONS=489} [2024-06-28 04:36:07,767 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-28 04:36:07,767 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 489 transitions, 7068 flow [2024-06-28 04:36:07,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:07,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:36:07,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:36:07,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 04:36:07,768 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 04:36:07,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:36:07,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1993469915, now seen corresponding path program 11 times [2024-06-28 04:36:07,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:36:07,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624111609] [2024-06-28 04:36:07,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:36:07,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:36:07,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:36:11,197 INFO 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 04:36:11,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:36:11,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624111609] [2024-06-28 04:36:11,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624111609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:36:11,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:36:11,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:36:11,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10377765] [2024-06-28 04:36:11,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:36:11,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:36:11,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:36:11,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:36:11,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:36:11,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:36:11,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 489 transitions, 7068 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:11,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:36:11,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:36:11,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:36:12,993 INFO L124 PetriNetUnfolderBase]: 3498/5564 cut-off events. [2024-06-28 04:36:12,994 INFO L125 PetriNetUnfolderBase]: For 331126/331126 co-relation queries the response was YES. [2024-06-28 04:36:13,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38733 conditions, 5564 events. 3498/5564 cut-off events. For 331126/331126 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 33718 event pairs, 733 based on Foata normal form. 2/5562 useless extension candidates. Maximal degree in co-relation 38590. Up to 5027 conditions per place. [2024-06-28 04:36:13,071 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 429 selfloop transitions, 77 changer transitions 0/511 dead transitions. [2024-06-28 04:36:13,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 511 transitions, 8182 flow [2024-06-28 04:36:13,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:36:13,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:36:13,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 04:36:13,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-28 04:36:13,073 INFO L175 Difference]: Start difference. First operand has 331 places, 489 transitions, 7068 flow. Second operand 8 states and 131 transitions. [2024-06-28 04:36:13,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 511 transitions, 8182 flow [2024-06-28 04:36:13,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 511 transitions, 7995 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-28 04:36:13,946 INFO L231 Difference]: Finished difference. Result has 335 places, 491 transitions, 7084 flow [2024-06-28 04:36:13,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6883, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7084, PETRI_PLACES=335, PETRI_TRANSITIONS=491} [2024-06-28 04:36:13,947 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-28 04:36:13,947 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 491 transitions, 7084 flow [2024-06-28 04:36:13,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:13,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:36:13,947 INFO 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 04:36:13,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 04:36:13,948 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 04:36:13,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:36:13,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1697718421, now seen corresponding path program 12 times [2024-06-28 04:36:13,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:36:13,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306602132] [2024-06-28 04:36:13,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:36:13,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:36:13,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:36:17,282 INFO 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 04:36:17,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:36:17,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306602132] [2024-06-28 04:36:17,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306602132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:36:17,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:36:17,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:36:17,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236911160] [2024-06-28 04:36:17,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:36:17,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:36:17,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:36:17,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:36:17,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:36:17,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:36:17,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 491 transitions, 7084 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:17,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:36:17,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:36:17,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:36:18,830 INFO L124 PetriNetUnfolderBase]: 3506/5580 cut-off events. [2024-06-28 04:36:18,830 INFO L125 PetriNetUnfolderBase]: For 337711/337711 co-relation queries the response was YES. [2024-06-28 04:36:18,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38756 conditions, 5580 events. 3506/5580 cut-off events. For 337711/337711 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 33886 event pairs, 733 based on Foata normal form. 2/5578 useless extension candidates. Maximal degree in co-relation 38612. Up to 5003 conditions per place. [2024-06-28 04:36:18,912 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 423 selfloop transitions, 86 changer transitions 0/514 dead transitions. [2024-06-28 04:36:18,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 514 transitions, 8214 flow [2024-06-28 04:36:18,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:36:18,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:36:18,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 04:36:18,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-28 04:36:18,914 INFO L175 Difference]: Start difference. First operand has 335 places, 491 transitions, 7084 flow. Second operand 8 states and 131 transitions. [2024-06-28 04:36:18,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 514 transitions, 8214 flow [2024-06-28 04:36:19,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 514 transitions, 8041 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-28 04:36:19,916 INFO L231 Difference]: Finished difference. Result has 338 places, 494 transitions, 7161 flow [2024-06-28 04:36:19,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6911, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7161, PETRI_PLACES=338, PETRI_TRANSITIONS=494} [2024-06-28 04:36:19,917 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-28 04:36:19,917 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 494 transitions, 7161 flow [2024-06-28 04:36:19,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:19,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:36:19,917 INFO 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 04:36:19,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 04:36:19,917 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 04:36:19,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:36:19,918 INFO L85 PathProgramCache]: Analyzing trace with hash -188174523, now seen corresponding path program 13 times [2024-06-28 04:36:19,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:36:19,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484783246] [2024-06-28 04:36:19,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:36:19,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:36:19,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:36:23,535 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 04:36:23,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:36:23,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484783246] [2024-06-28 04:36:23,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484783246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:36:23,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:36:23,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:36:23,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77311610] [2024-06-28 04:36:23,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:36:23,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:36:23,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:36:23,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:36:23,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:36:23,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:36:23,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 494 transitions, 7161 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:23,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:36:23,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:36:23,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:36:25,234 INFO L124 PetriNetUnfolderBase]: 3501/5536 cut-off events. [2024-06-28 04:36:25,234 INFO L125 PetriNetUnfolderBase]: For 338639/338639 co-relation queries the response was YES. [2024-06-28 04:36:25,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38653 conditions, 5536 events. 3501/5536 cut-off events. For 338639/338639 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 33417 event pairs, 820 based on Foata normal form. 2/5530 useless extension candidates. Maximal degree in co-relation 38507. Up to 5074 conditions per place. [2024-06-28 04:36:25,312 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 391 selfloop transitions, 113 changer transitions 0/509 dead transitions. [2024-06-28 04:36:25,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 509 transitions, 8211 flow [2024-06-28 04:36:25,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:36:25,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:36:25,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-28 04:36:25,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-28 04:36:25,313 INFO L175 Difference]: Start difference. First operand has 338 places, 494 transitions, 7161 flow. Second operand 9 states and 138 transitions. [2024-06-28 04:36:25,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 509 transitions, 8211 flow [2024-06-28 04:36:26,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 509 transitions, 8011 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-28 04:36:26,187 INFO L231 Difference]: Finished difference. Result has 342 places, 494 transitions, 7192 flow [2024-06-28 04:36:26,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6961, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7192, PETRI_PLACES=342, PETRI_TRANSITIONS=494} [2024-06-28 04:36:26,188 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-28 04:36:26,188 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 494 transitions, 7192 flow [2024-06-28 04:36:26,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:26,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:36:26,189 INFO 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 04:36:26,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 04:36:26,189 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 04:36:26,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:36:26,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1039863711, now seen corresponding path program 14 times [2024-06-28 04:36:26,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:36:26,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269025931] [2024-06-28 04:36:26,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:36:26,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:36:26,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:36:29,922 INFO 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 04:36:29,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:36:29,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269025931] [2024-06-28 04:36:29,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269025931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:36:29,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:36:29,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:36:29,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034492630] [2024-06-28 04:36:29,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:36:29,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:36:29,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:36:29,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:36:29,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:36:29,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:36:29,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 494 transitions, 7192 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:29,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:36:29,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:36:29,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:36:31,657 INFO L124 PetriNetUnfolderBase]: 3555/5616 cut-off events. [2024-06-28 04:36:31,657 INFO L125 PetriNetUnfolderBase]: For 373720/373720 co-relation queries the response was YES. [2024-06-28 04:36:31,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39935 conditions, 5616 events. 3555/5616 cut-off events. For 373720/373720 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 33822 event pairs, 824 based on Foata normal form. 2/5610 useless extension candidates. Maximal degree in co-relation 39788. Up to 4906 conditions per place. [2024-06-28 04:36:31,737 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 382 selfloop transitions, 128 changer transitions 0/515 dead transitions. [2024-06-28 04:36:31,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 515 transitions, 8498 flow [2024-06-28 04:36:31,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:36:31,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:36:31,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-28 04:36:31,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-28 04:36:31,739 INFO L175 Difference]: Start difference. First operand has 342 places, 494 transitions, 7192 flow. Second operand 9 states and 143 transitions. [2024-06-28 04:36:31,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 515 transitions, 8498 flow [2024-06-28 04:36:32,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 515 transitions, 8235 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-28 04:36:32,910 INFO L231 Difference]: Finished difference. Result has 344 places, 495 transitions, 7254 flow [2024-06-28 04:36:32,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6929, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7254, PETRI_PLACES=344, PETRI_TRANSITIONS=495} [2024-06-28 04:36:32,911 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-28 04:36:32,911 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 495 transitions, 7254 flow [2024-06-28 04:36:32,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:32,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:36:32,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:36:32,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 04:36:32,911 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 04:36:32,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:36:32,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1129034329, now seen corresponding path program 15 times [2024-06-28 04:36:32,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:36:32,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463433595] [2024-06-28 04:36:32,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:36:32,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:36:32,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:36:36,378 INFO 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 04:36:36,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:36:36,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463433595] [2024-06-28 04:36:36,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463433595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:36:36,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:36:36,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:36:36,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132790234] [2024-06-28 04:36:36,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:36:36,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:36:36,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:36:36,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:36:36,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:36:36,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:36:36,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 495 transitions, 7254 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:36,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:36:36,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:36:36,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:36:38,231 INFO L124 PetriNetUnfolderBase]: 3527/5578 cut-off events. [2024-06-28 04:36:38,231 INFO L125 PetriNetUnfolderBase]: For 375698/375698 co-relation queries the response was YES. [2024-06-28 04:36:38,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38975 conditions, 5578 events. 3527/5578 cut-off events. For 375698/375698 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 33621 event pairs, 822 based on Foata normal form. 12/5582 useless extension candidates. Maximal degree in co-relation 38826. Up to 5074 conditions per place. [2024-06-28 04:36:38,309 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 400 selfloop transitions, 112 changer transitions 0/517 dead transitions. [2024-06-28 04:36:38,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 517 transitions, 8378 flow [2024-06-28 04:36:38,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:36:38,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:36:38,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-28 04:36:38,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761904761904762 [2024-06-28 04:36:38,311 INFO L175 Difference]: Start difference. First operand has 344 places, 495 transitions, 7254 flow. Second operand 10 states and 158 transitions. [2024-06-28 04:36:38,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 517 transitions, 8378 flow [2024-06-28 04:36:39,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 517 transitions, 8088 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-28 04:36:39,469 INFO L231 Difference]: Finished difference. Result has 346 places, 495 transitions, 7196 flow [2024-06-28 04:36:39,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6964, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7196, PETRI_PLACES=346, PETRI_TRANSITIONS=495} [2024-06-28 04:36:39,470 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-28 04:36:39,470 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 495 transitions, 7196 flow [2024-06-28 04:36:39,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:39,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:36:39,470 INFO 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 04:36:39,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-28 04:36:39,470 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 04:36:39,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:36:39,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1973482346, now seen corresponding path program 1 times [2024-06-28 04:36:39,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:36:39,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040523890] [2024-06-28 04:36:39,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:36:39,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:36:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:36:42,638 INFO 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 04:36:42,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:36:42,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040523890] [2024-06-28 04:36:42,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040523890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:36:42,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:36:42,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:36:42,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630548224] [2024-06-28 04:36:42,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:36:42,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:36:42,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:36:42,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:36:42,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:36:42,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:36:42,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 495 transitions, 7196 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:42,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:36:42,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:36:42,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:36:44,980 INFO L124 PetriNetUnfolderBase]: 3647/5789 cut-off events. [2024-06-28 04:36:44,981 INFO L125 PetriNetUnfolderBase]: For 400187/400187 co-relation queries the response was YES. [2024-06-28 04:36:45,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40705 conditions, 5789 events. 3647/5789 cut-off events. For 400187/400187 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 35359 event pairs, 803 based on Foata normal form. 8/5796 useless extension candidates. Maximal degree in co-relation 40556. Up to 5058 conditions per place. [2024-06-28 04:36:45,055 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 450 selfloop transitions, 98 changer transitions 0/553 dead transitions. [2024-06-28 04:36:45,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 553 transitions, 8754 flow [2024-06-28 04:36:45,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:36:45,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:36:45,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-28 04:36:45,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-28 04:36:45,056 INFO L175 Difference]: Start difference. First operand has 346 places, 495 transitions, 7196 flow. Second operand 10 states and 191 transitions. [2024-06-28 04:36:45,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 553 transitions, 8754 flow [2024-06-28 04:36:46,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 553 transitions, 8520 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-28 04:36:46,167 INFO L231 Difference]: Finished difference. Result has 350 places, 502 transitions, 7331 flow [2024-06-28 04:36:46,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6962, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7331, PETRI_PLACES=350, PETRI_TRANSITIONS=502} [2024-06-28 04:36:46,168 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-28 04:36:46,168 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 502 transitions, 7331 flow [2024-06-28 04:36:46,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:46,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:36:46,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:36:46,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-28 04:36:46,168 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:36:46,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:36:46,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1753006930, now seen corresponding path program 2 times [2024-06-28 04:36:46,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:36:46,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278655504] [2024-06-28 04:36:46,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:36:46,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:36:46,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:36:49,588 INFO 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 04:36:49,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:36:49,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278655504] [2024-06-28 04:36:49,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278655504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:36:49,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:36:49,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:36:49,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212852511] [2024-06-28 04:36:49,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:36:49,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:36:49,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:36:49,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:36:49,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:36:49,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:36:49,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 502 transitions, 7331 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:49,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:36:49,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:36:49,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:36:51,832 INFO L124 PetriNetUnfolderBase]: 3721/5909 cut-off events. [2024-06-28 04:36:51,832 INFO L125 PetriNetUnfolderBase]: For 411020/411020 co-relation queries the response was YES. [2024-06-28 04:36:51,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41786 conditions, 5909 events. 3721/5909 cut-off events. For 411020/411020 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 36145 event pairs, 833 based on Foata normal form. 8/5916 useless extension candidates. Maximal degree in co-relation 41634. Up to 5320 conditions per place. [2024-06-28 04:36:51,912 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 455 selfloop transitions, 92 changer transitions 0/552 dead transitions. [2024-06-28 04:36:51,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 552 transitions, 8679 flow [2024-06-28 04:36:51,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:36:51,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:36:51,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-28 04:36:51,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-28 04:36:51,914 INFO L175 Difference]: Start difference. First operand has 350 places, 502 transitions, 7331 flow. Second operand 10 states and 185 transitions. [2024-06-28 04:36:51,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 552 transitions, 8679 flow [2024-06-28 04:36:53,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 552 transitions, 8594 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-28 04:36:53,235 INFO L231 Difference]: Finished difference. Result has 357 places, 507 transitions, 7541 flow [2024-06-28 04:36:53,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7250, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7541, PETRI_PLACES=357, PETRI_TRANSITIONS=507} [2024-06-28 04:36:53,235 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-28 04:36:53,236 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 507 transitions, 7541 flow [2024-06-28 04:36:53,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:53,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:36:53,236 INFO 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 04:36:53,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-28 04:36:53,236 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:36:53,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:36:53,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1359874190, now seen corresponding path program 1 times [2024-06-28 04:36:53,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:36:53,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936164205] [2024-06-28 04:36:53,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:36:53,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:36:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:36:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:36:56,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:36:56,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936164205] [2024-06-28 04:36:56,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936164205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:36:56,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:36:56,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:36:56,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253354730] [2024-06-28 04:36:56,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:36:56,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:36:56,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:36:56,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:36:56,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:36:56,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:36:56,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 507 transitions, 7541 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:56,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:36:56,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:36:56,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:36:58,391 INFO L124 PetriNetUnfolderBase]: 3781/5991 cut-off events. [2024-06-28 04:36:58,391 INFO L125 PetriNetUnfolderBase]: For 406539/406539 co-relation queries the response was YES. [2024-06-28 04:36:58,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42557 conditions, 5991 events. 3781/5991 cut-off events. For 406539/406539 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 36654 event pairs, 815 based on Foata normal form. 4/5994 useless extension candidates. Maximal degree in co-relation 42402. Up to 5332 conditions per place. [2024-06-28 04:36:58,462 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 439 selfloop transitions, 115 changer transitions 0/559 dead transitions. [2024-06-28 04:36:58,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 559 transitions, 8885 flow [2024-06-28 04:36:58,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:36:58,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:36:58,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-28 04:36:58,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-28 04:36:58,464 INFO L175 Difference]: Start difference. First operand has 357 places, 507 transitions, 7541 flow. Second operand 10 states and 188 transitions. [2024-06-28 04:36:58,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 559 transitions, 8885 flow [2024-06-28 04:36:59,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 559 transitions, 8700 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-28 04:36:59,820 INFO L231 Difference]: Finished difference. Result has 362 places, 516 transitions, 7758 flow [2024-06-28 04:36:59,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7356, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7758, PETRI_PLACES=362, PETRI_TRANSITIONS=516} [2024-06-28 04:36:59,820 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-28 04:36:59,820 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 516 transitions, 7758 flow [2024-06-28 04:36:59,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:59,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:36:59,821 INFO 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 04:36:59,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-28 04:36:59,821 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:36:59,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:36:59,822 INFO L85 PathProgramCache]: Analyzing trace with hash -607333586, now seen corresponding path program 3 times [2024-06-28 04:36:59,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:36:59,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233633014] [2024-06-28 04:36:59,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:36:59,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:36:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:37:03,231 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 04:37:03,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:37:03,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233633014] [2024-06-28 04:37:03,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233633014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:37:03,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:37:03,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:37:03,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380731263] [2024-06-28 04:37:03,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:37:03,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:37:03,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:37:03,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:37:03,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:37:03,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:37:03,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 516 transitions, 7758 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:03,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:37:03,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:37:03,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:37:05,417 INFO L124 PetriNetUnfolderBase]: 3763/5954 cut-off events. [2024-06-28 04:37:05,417 INFO L125 PetriNetUnfolderBase]: For 400311/400311 co-relation queries the response was YES. [2024-06-28 04:37:05,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42264 conditions, 5954 events. 3763/5954 cut-off events. For 400311/400311 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 36378 event pairs, 817 based on Foata normal form. 8/5961 useless extension candidates. Maximal degree in co-relation 42107. Up to 5388 conditions per place. [2024-06-28 04:37:05,485 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 457 selfloop transitions, 93 changer transitions 0/555 dead transitions. [2024-06-28 04:37:05,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 555 transitions, 9010 flow [2024-06-28 04:37:05,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:37:05,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:37:05,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-28 04:37:05,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-28 04:37:05,486 INFO L175 Difference]: Start difference. First operand has 362 places, 516 transitions, 7758 flow. Second operand 10 states and 176 transitions. [2024-06-28 04:37:05,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 555 transitions, 9010 flow [2024-06-28 04:37:06,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 555 transitions, 8744 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-28 04:37:06,998 INFO L231 Difference]: Finished difference. Result has 365 places, 516 transitions, 7682 flow [2024-06-28 04:37:06,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7492, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7682, PETRI_PLACES=365, PETRI_TRANSITIONS=516} [2024-06-28 04:37:06,998 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-28 04:37:06,998 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 516 transitions, 7682 flow [2024-06-28 04:37:06,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:06,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:37:06,999 INFO 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 04:37:06,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-28 04:37:06,999 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:37:06,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:37:06,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1050238140, now seen corresponding path program 2 times [2024-06-28 04:37:07,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:37:07,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839163825] [2024-06-28 04:37:07,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:37:07,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:37:07,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:37:10,041 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 04:37:10,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:37:10,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839163825] [2024-06-28 04:37:10,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839163825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:37:10,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:37:10,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:37:10,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18631158] [2024-06-28 04:37:10,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:37:10,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:37:10,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:37:10,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:37:10,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:37:10,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:37:10,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 516 transitions, 7682 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:10,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:37:10,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:37:10,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:37:12,456 INFO L124 PetriNetUnfolderBase]: 3939/6222 cut-off events. [2024-06-28 04:37:12,456 INFO L125 PetriNetUnfolderBase]: For 442612/442614 co-relation queries the response was YES. [2024-06-28 04:37:12,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44641 conditions, 6222 events. 3939/6222 cut-off events. For 442612/442614 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 38077 event pairs, 732 based on Foata normal form. 6/6227 useless extension candidates. Maximal degree in co-relation 44483. Up to 4226 conditions per place. [2024-06-28 04:37:12,526 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 327 selfloop transitions, 264 changer transitions 0/596 dead transitions. [2024-06-28 04:37:12,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 596 transitions, 10148 flow [2024-06-28 04:37:12,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:37:12,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:37:12,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-28 04:37:12,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-28 04:37:12,528 INFO L175 Difference]: Start difference. First operand has 365 places, 516 transitions, 7682 flow. Second operand 10 states and 198 transitions. [2024-06-28 04:37:12,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 596 transitions, 10148 flow [2024-06-28 04:37:13,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 596 transitions, 9939 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-28 04:37:13,902 INFO L231 Difference]: Finished difference. Result has 368 places, 538 transitions, 8465 flow [2024-06-28 04:37:13,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7473, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8465, PETRI_PLACES=368, PETRI_TRANSITIONS=538} [2024-06-28 04:37:13,902 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-28 04:37:13,903 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 538 transitions, 8465 flow [2024-06-28 04:37:13,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:13,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:37:13,916 INFO 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 04:37:13,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-28 04:37:13,916 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:37:13,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:37:13,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1861699244, now seen corresponding path program 3 times [2024-06-28 04:37:13,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:37:13,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823840240] [2024-06-28 04:37:13,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:37:13,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:37:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:37:17,091 INFO 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 04:37:17,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:37:17,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823840240] [2024-06-28 04:37:17,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823840240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:37:17,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:37:17,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:37:17,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365308492] [2024-06-28 04:37:17,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:37:17,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:37:17,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:37:17,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:37:17,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:37:17,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:37:17,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 538 transitions, 8465 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:17,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:37:17,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:37:17,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:37:19,412 INFO L124 PetriNetUnfolderBase]: 3991/6294 cut-off events. [2024-06-28 04:37:19,412 INFO L125 PetriNetUnfolderBase]: For 474677/474679 co-relation queries the response was YES. [2024-06-28 04:37:19,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47032 conditions, 6294 events. 3991/6294 cut-off events. For 474677/474679 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 38497 event pairs, 722 based on Foata normal form. 6/6299 useless extension candidates. Maximal degree in co-relation 46873. Up to 4266 conditions per place. [2024-06-28 04:37:19,503 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 319 selfloop transitions, 274 changer transitions 0/598 dead transitions. [2024-06-28 04:37:19,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 598 transitions, 10702 flow [2024-06-28 04:37:19,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:37:19,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:37:19,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-28 04:37:19,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-28 04:37:19,505 INFO L175 Difference]: Start difference. First operand has 368 places, 538 transitions, 8465 flow. Second operand 10 states and 194 transitions. [2024-06-28 04:37:19,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 598 transitions, 10702 flow [2024-06-28 04:37:21,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 598 transitions, 10519 flow, removed 78 selfloop flow, removed 3 redundant places. [2024-06-28 04:37:21,290 INFO L231 Difference]: Finished difference. Result has 375 places, 544 transitions, 8980 flow [2024-06-28 04:37:21,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8330, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8980, PETRI_PLACES=375, PETRI_TRANSITIONS=544} [2024-06-28 04:37:21,290 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-28 04:37:21,290 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 544 transitions, 8980 flow [2024-06-28 04:37:21,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:21,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:37:21,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:37:21,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-28 04:37:21,292 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:37:21,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:37:21,292 INFO L85 PathProgramCache]: Analyzing trace with hash 2026893626, now seen corresponding path program 4 times [2024-06-28 04:37:21,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:37:21,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085400637] [2024-06-28 04:37:21,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:37:21,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:37:21,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:37:24,670 INFO 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 04:37:24,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:37:24,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085400637] [2024-06-28 04:37:24,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085400637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:37:24,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:37:24,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:37:24,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034989696] [2024-06-28 04:37:24,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:37:24,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:37:24,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:37:24,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:37:24,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:37:24,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:37:24,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 544 transitions, 8980 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:24,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:37:24,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:37:24,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:37:27,170 INFO L124 PetriNetUnfolderBase]: 3979/6278 cut-off events. [2024-06-28 04:37:27,171 INFO L125 PetriNetUnfolderBase]: For 467308/467310 co-relation queries the response was YES. [2024-06-28 04:37:27,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47024 conditions, 6278 events. 3979/6278 cut-off events. For 467308/467310 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 38430 event pairs, 720 based on Foata normal form. 6/6283 useless extension candidates. Maximal degree in co-relation 46863. Up to 4258 conditions per place. [2024-06-28 04:37:27,259 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 325 selfloop transitions, 269 changer transitions 0/599 dead transitions. [2024-06-28 04:37:27,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 599 transitions, 11085 flow [2024-06-28 04:37:27,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:37:27,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:37:27,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-28 04:37:27,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-28 04:37:27,261 INFO L175 Difference]: Start difference. First operand has 375 places, 544 transitions, 8980 flow. Second operand 10 states and 196 transitions. [2024-06-28 04:37:27,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 599 transitions, 11085 flow [2024-06-28 04:37:29,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 599 transitions, 10570 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-28 04:37:29,284 INFO L231 Difference]: Finished difference. Result has 379 places, 544 transitions, 9009 flow [2024-06-28 04:37:29,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8465, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9009, PETRI_PLACES=379, PETRI_TRANSITIONS=544} [2024-06-28 04:37:29,285 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-28 04:37:29,285 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 544 transitions, 9009 flow [2024-06-28 04:37:29,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:29,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:37:29,285 INFO 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 04:37:29,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-28 04:37:29,286 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:37:29,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:37:29,286 INFO L85 PathProgramCache]: Analyzing trace with hash -259973750, now seen corresponding path program 5 times [2024-06-28 04:37:29,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:37:29,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820227925] [2024-06-28 04:37:29,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:37:29,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:37:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:37:32,114 INFO 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 04:37:32,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:37:32,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820227925] [2024-06-28 04:37:32,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820227925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:37:32,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:37:32,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:37:32,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516900641] [2024-06-28 04:37:32,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:37:32,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:37:32,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:37:32,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:37:32,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:37:32,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:37:32,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 544 transitions, 9009 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:32,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:37:32,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:37:32,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:37:34,494 INFO L124 PetriNetUnfolderBase]: 3999/6298 cut-off events. [2024-06-28 04:37:34,495 INFO L125 PetriNetUnfolderBase]: For 476592/476592 co-relation queries the response was YES. [2024-06-28 04:37:34,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47203 conditions, 6298 events. 3999/6298 cut-off events. For 476592/476592 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 38527 event pairs, 865 based on Foata normal form. 4/6301 useless extension candidates. Maximal degree in co-relation 47041. Up to 5572 conditions per place. [2024-06-28 04:37:34,576 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 440 selfloop transitions, 141 changer transitions 0/586 dead transitions. [2024-06-28 04:37:34,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 586 transitions, 10516 flow [2024-06-28 04:37:34,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:37:34,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:37:34,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 203 transitions. [2024-06-28 04:37:34,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-28 04:37:34,578 INFO L175 Difference]: Start difference. First operand has 379 places, 544 transitions, 9009 flow. Second operand 12 states and 203 transitions. [2024-06-28 04:37:34,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 586 transitions, 10516 flow [2024-06-28 04:37:35,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 586 transitions, 9977 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-28 04:37:35,975 INFO L231 Difference]: Finished difference. Result has 384 places, 547 transitions, 8815 flow [2024-06-28 04:37:35,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8476, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8815, PETRI_PLACES=384, PETRI_TRANSITIONS=547} [2024-06-28 04:37:35,975 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-28 04:37:35,976 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 547 transitions, 8815 flow [2024-06-28 04:37:35,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:35,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:37:35,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:37:35,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-28 04:37:35,976 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:37:35,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:37:35,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1853096520, now seen corresponding path program 6 times [2024-06-28 04:37:35,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:37:35,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947569056] [2024-06-28 04:37:35,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:37:35,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:37:35,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:37:40,120 INFO 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 04:37:40,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:37:40,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947569056] [2024-06-28 04:37:40,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947569056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:37:40,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:37:40,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:37:40,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330790839] [2024-06-28 04:37:40,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:37:40,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:37:40,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:37:40,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:37:40,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:37:40,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:37:40,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 547 transitions, 8815 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:40,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:37:40,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:37:40,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:37:42,294 INFO L124 PetriNetUnfolderBase]: 4019/6336 cut-off events. [2024-06-28 04:37:42,294 INFO L125 PetriNetUnfolderBase]: For 482216/482216 co-relation queries the response was YES. [2024-06-28 04:37:42,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46778 conditions, 6336 events. 4019/6336 cut-off events. For 482216/482216 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 38863 event pairs, 877 based on Foata normal form. 4/6339 useless extension candidates. Maximal degree in co-relation 46615. Up to 5588 conditions per place. [2024-06-28 04:37:42,382 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 450 selfloop transitions, 131 changer transitions 0/586 dead transitions. [2024-06-28 04:37:42,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 586 transitions, 10318 flow [2024-06-28 04:37:42,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:37:42,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:37:42,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-28 04:37:42,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-28 04:37:42,384 INFO L175 Difference]: Start difference. First operand has 384 places, 547 transitions, 8815 flow. Second operand 10 states and 178 transitions. [2024-06-28 04:37:42,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 586 transitions, 10318 flow [2024-06-28 04:37:44,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 586 transitions, 9949 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-28 04:37:44,349 INFO L231 Difference]: Finished difference. Result has 385 places, 550 transitions, 8771 flow [2024-06-28 04:37:44,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8460, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8771, PETRI_PLACES=385, PETRI_TRANSITIONS=550} [2024-06-28 04:37:44,350 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 342 predicate places. [2024-06-28 04:37:44,350 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 550 transitions, 8771 flow [2024-06-28 04:37:44,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:44,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:37:44,350 INFO 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 04:37:44,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-28 04:37:44,351 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:37:44,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:37:44,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1853452710, now seen corresponding path program 7 times [2024-06-28 04:37:44,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:37:44,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723822933] [2024-06-28 04:37:44,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:37:44,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:37:44,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:37:47,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:37:47,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:37:47,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723822933] [2024-06-28 04:37:47,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723822933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:37:47,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:37:47,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:37:47,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107040112] [2024-06-28 04:37:47,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:37:47,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:37:47,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:37:47,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:37:47,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:37:47,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:37:47,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 550 transitions, 8771 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:47,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:37:47,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:37:47,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:37:49,542 INFO L124 PetriNetUnfolderBase]: 4007/6318 cut-off events. [2024-06-28 04:37:49,542 INFO L125 PetriNetUnfolderBase]: For 471797/471797 co-relation queries the response was YES. [2024-06-28 04:37:49,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46223 conditions, 6318 events. 4007/6318 cut-off events. For 471797/471797 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 38702 event pairs, 871 based on Foata normal form. 4/6321 useless extension candidates. Maximal degree in co-relation 46059. Up to 5580 conditions per place. [2024-06-28 04:37:49,625 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 445 selfloop transitions, 135 changer transitions 0/585 dead transitions. [2024-06-28 04:37:49,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 585 transitions, 10029 flow [2024-06-28 04:37:49,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:37:49,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:37:49,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-28 04:37:49,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-28 04:37:49,627 INFO L175 Difference]: Start difference. First operand has 385 places, 550 transitions, 8771 flow. Second operand 10 states and 177 transitions. [2024-06-28 04:37:49,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 585 transitions, 10029 flow [2024-06-28 04:37:51,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 585 transitions, 9699 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-28 04:37:51,331 INFO L231 Difference]: Finished difference. Result has 387 places, 550 transitions, 8717 flow [2024-06-28 04:37:51,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8441, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8717, PETRI_PLACES=387, PETRI_TRANSITIONS=550} [2024-06-28 04:37:51,332 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-28 04:37:51,332 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 550 transitions, 8717 flow [2024-06-28 04:37:51,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:51,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:37:51,332 INFO 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 04:37:51,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-28 04:37:51,332 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:37:51,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:37:51,333 INFO L85 PathProgramCache]: Analyzing trace with hash -425397716, now seen corresponding path program 4 times [2024-06-28 04:37:51,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:37:51,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319179796] [2024-06-28 04:37:51,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:37:51,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:37:51,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:37:54,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:37:54,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:37:54,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319179796] [2024-06-28 04:37:54,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319179796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:37:54,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:37:54,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:37:54,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648414535] [2024-06-28 04:37:54,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:37:54,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:37:54,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:37:54,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:37:54,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:37:54,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:37:54,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 550 transitions, 8717 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:54,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:37:54,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:37:54,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:37:56,272 INFO L124 PetriNetUnfolderBase]: 4203/6635 cut-off events. [2024-06-28 04:37:56,272 INFO L125 PetriNetUnfolderBase]: For 538523/538523 co-relation queries the response was YES. [2024-06-28 04:37:56,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48749 conditions, 6635 events. 4203/6635 cut-off events. For 538523/538523 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 41050 event pairs, 967 based on Foata normal form. 8/6642 useless extension candidates. Maximal degree in co-relation 48584. Up to 5780 conditions per place. [2024-06-28 04:37:56,366 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 497 selfloop transitions, 111 changer transitions 0/613 dead transitions. [2024-06-28 04:37:56,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 613 transitions, 10496 flow [2024-06-28 04:37:56,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:37:56,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:37:56,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-28 04:37:56,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-28 04:37:56,368 INFO L175 Difference]: Start difference. First operand has 387 places, 550 transitions, 8717 flow. Second operand 10 states and 191 transitions. [2024-06-28 04:37:56,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 613 transitions, 10496 flow [2024-06-28 04:37:58,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 613 transitions, 10189 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-28 04:37:58,619 INFO L231 Difference]: Finished difference. Result has 388 places, 559 transitions, 8842 flow [2024-06-28 04:37:58,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8416, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8842, PETRI_PLACES=388, PETRI_TRANSITIONS=559} [2024-06-28 04:37:58,619 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-28 04:37:58,619 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 559 transitions, 8842 flow [2024-06-28 04:37:58,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:58,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:37:58,621 INFO 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 04:37:58,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-28 04:37:58,621 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:37:58,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:37:58,621 INFO L85 PathProgramCache]: Analyzing trace with hash 411364204, now seen corresponding path program 5 times [2024-06-28 04:37:58,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:37:58,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9953800] [2024-06-28 04:37:58,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:37:58,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:37:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:38:01,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:38:01,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:38:01,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9953800] [2024-06-28 04:38:01,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9953800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:38:01,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:38:01,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:38:01,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926575276] [2024-06-28 04:38:01,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:38:01,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:38:01,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:38:01,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:38:01,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:38:01,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:38:01,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 559 transitions, 8842 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:38:01,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:38:01,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:38:01,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:38:04,009 INFO L124 PetriNetUnfolderBase]: 4185/6613 cut-off events. [2024-06-28 04:38:04,009 INFO L125 PetriNetUnfolderBase]: For 513185/513185 co-relation queries the response was YES. [2024-06-28 04:38:04,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48120 conditions, 6613 events. 4185/6613 cut-off events. For 513185/513185 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 40988 event pairs, 985 based on Foata normal form. 8/6620 useless extension candidates. Maximal degree in co-relation 47953. Up to 5922 conditions per place. [2024-06-28 04:38:04,106 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 498 selfloop transitions, 102 changer transitions 0/605 dead transitions. [2024-06-28 04:38:04,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 605 transitions, 10220 flow [2024-06-28 04:38:04,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:38:04,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:38:04,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-28 04:38:04,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-28 04:38:04,107 INFO L175 Difference]: Start difference. First operand has 388 places, 559 transitions, 8842 flow. Second operand 10 states and 182 transitions. [2024-06-28 04:38:04,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 605 transitions, 10220 flow [2024-06-28 04:38:06,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 605 transitions, 9993 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-28 04:38:06,461 INFO L231 Difference]: Finished difference. Result has 392 places, 559 transitions, 8825 flow [2024-06-28 04:38:06,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8615, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8825, PETRI_PLACES=392, PETRI_TRANSITIONS=559} [2024-06-28 04:38:06,461 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 349 predicate places. [2024-06-28 04:38:06,461 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 559 transitions, 8825 flow [2024-06-28 04:38:06,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:38:06,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:38:06,462 INFO 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 04:38:06,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-28 04:38:06,462 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:38:06,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:38:06,462 INFO L85 PathProgramCache]: Analyzing trace with hash -360699602, now seen corresponding path program 6 times [2024-06-28 04:38:06,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:38:06,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993875419] [2024-06-28 04:38:06,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:38:06,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:38:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:38:09,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:38:09,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:38:09,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993875419] [2024-06-28 04:38:09,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993875419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:38:09,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:38:09,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:38:09,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529923738] [2024-06-28 04:38:09,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:38:09,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:38:09,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:38:09,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:38:09,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:38:09,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:38:09,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 559 transitions, 8825 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 04:38:09,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:38:09,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:38:09,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:38:11,615 INFO L124 PetriNetUnfolderBase]: 4329/6849 cut-off events. [2024-06-28 04:38:11,616 INFO L125 PetriNetUnfolderBase]: For 523741/523741 co-relation queries the response was YES. [2024-06-28 04:38:11,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49289 conditions, 6849 events. 4329/6849 cut-off events. For 523741/523741 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 42548 event pairs, 875 based on Foata normal form. 8/6856 useless extension candidates. Maximal degree in co-relation 49122. Up to 5370 conditions per place. [2024-06-28 04:38:11,717 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 476 selfloop transitions, 136 changer transitions 0/617 dead transitions. [2024-06-28 04:38:11,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 617 transitions, 10531 flow [2024-06-28 04:38:11,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:38:11,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:38:11,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-28 04:38:11,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-28 04:38:11,719 INFO L175 Difference]: Start difference. First operand has 392 places, 559 transitions, 8825 flow. Second operand 10 states and 186 transitions. [2024-06-28 04:38:11,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 617 transitions, 10531 flow [2024-06-28 04:38:13,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 617 transitions, 10306 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-28 04:38:13,982 INFO L231 Difference]: Finished difference. Result has 395 places, 565 transitions, 9040 flow [2024-06-28 04:38:13,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8600, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9040, PETRI_PLACES=395, PETRI_TRANSITIONS=565} [2024-06-28 04:38:13,982 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-28 04:38:13,983 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 565 transitions, 9040 flow [2024-06-28 04:38:13,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 04:38:13,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:38:13,983 INFO 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 04:38:13,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-28 04:38:13,983 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:38:13,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:38:13,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1243241772, now seen corresponding path program 8 times [2024-06-28 04:38:13,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:38:13,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848422876] [2024-06-28 04:38:13,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:38:13,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:38:13,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:38:16,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:38:16,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:38:16,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848422876] [2024-06-28 04:38:16,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848422876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:38:16,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:38:16,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:38:16,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093272233] [2024-06-28 04:38:16,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:38:16,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:38:16,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:38:16,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:38:16,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:38:16,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:38:16,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 565 transitions, 9040 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:38:16,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:38:16,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:38:16,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:38:19,260 INFO L124 PetriNetUnfolderBase]: 4461/7033 cut-off events. [2024-06-28 04:38:19,261 INFO L125 PetriNetUnfolderBase]: For 539058/539058 co-relation queries the response was YES. [2024-06-28 04:38:19,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51683 conditions, 7033 events. 4461/7033 cut-off events. For 539058/539058 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 43813 event pairs, 1054 based on Foata normal form. 4/7036 useless extension candidates. Maximal degree in co-relation 51514. Up to 5984 conditions per place. [2024-06-28 04:38:19,363 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 453 selfloop transitions, 186 changer transitions 0/644 dead transitions. [2024-06-28 04:38:19,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 644 transitions, 11177 flow [2024-06-28 04:38:19,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:38:19,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:38:19,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 228 transitions. [2024-06-28 04:38:19,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 04:38:19,365 INFO L175 Difference]: Start difference. First operand has 395 places, 565 transitions, 9040 flow. Second operand 12 states and 228 transitions. [2024-06-28 04:38:19,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 644 transitions, 11177 flow [2024-06-28 04:38:22,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 644 transitions, 10933 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-28 04:38:22,180 INFO L231 Difference]: Finished difference. Result has 402 places, 583 transitions, 9534 flow [2024-06-28 04:38:22,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8796, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9534, PETRI_PLACES=402, PETRI_TRANSITIONS=583} [2024-06-28 04:38:22,181 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-28 04:38:22,181 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 583 transitions, 9534 flow [2024-06-28 04:38:22,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:38:22,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:38:22,182 INFO 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 04:38:22,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-28 04:38:22,182 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:38:22,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:38:22,183 INFO L85 PathProgramCache]: Analyzing trace with hash -843369436, now seen corresponding path program 1 times [2024-06-28 04:38:22,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:38:22,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988189983] [2024-06-28 04:38:22,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:38:22,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:38:22,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:38:25,465 INFO 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 04:38:25,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:38:25,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988189983] [2024-06-28 04:38:25,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988189983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:38:25,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:38:25,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:38:25,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31985677] [2024-06-28 04:38:25,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:38:25,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:38:25,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:38:25,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:38:25,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:38:25,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:38:25,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 583 transitions, 9534 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 04:38:25,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:38:25,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:38:25,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:38:27,880 INFO L124 PetriNetUnfolderBase]: 4561/7203 cut-off events. [2024-06-28 04:38:27,880 INFO L125 PetriNetUnfolderBase]: For 627800/627802 co-relation queries the response was YES. [2024-06-28 04:38:27,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54271 conditions, 7203 events. 4561/7203 cut-off events. For 627800/627802 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 44977 event pairs, 1023 based on Foata normal form. 10/7212 useless extension candidates. Maximal degree in co-relation 54099. Up to 6060 conditions per place. [2024-06-28 04:38:27,988 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 503 selfloop transitions, 135 changer transitions 0/643 dead transitions. [2024-06-28 04:38:27,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 643 transitions, 11293 flow [2024-06-28 04:38:27,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:38:27,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:38:27,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-28 04:38:27,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-28 04:38:27,990 INFO L175 Difference]: Start difference. First operand has 402 places, 583 transitions, 9534 flow. Second operand 10 states and 193 transitions. [2024-06-28 04:38:27,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 643 transitions, 11293 flow [2024-06-28 04:38:30,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 643 transitions, 10948 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-28 04:38:30,153 INFO L231 Difference]: Finished difference. Result has 405 places, 587 transitions, 9526 flow [2024-06-28 04:38:30,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9190, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9526, PETRI_PLACES=405, PETRI_TRANSITIONS=587} [2024-06-28 04:38:30,154 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 362 predicate places. [2024-06-28 04:38:30,154 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 587 transitions, 9526 flow [2024-06-28 04:38:30,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 04:38:30,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:38:30,155 INFO 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 04:38:30,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-28 04:38:30,155 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:38:30,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:38:30,155 INFO L85 PathProgramCache]: Analyzing trace with hash -841491766, now seen corresponding path program 2 times [2024-06-28 04:38:30,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:38:30,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719896766] [2024-06-28 04:38:30,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:38:30,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:38:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:38:33,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:38:33,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:38:33,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719896766] [2024-06-28 04:38:33,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719896766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:38:33,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:38:33,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:38:33,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687828801] [2024-06-28 04:38:33,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:38:33,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:38:33,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:38:33,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:38:33,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:38:33,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:38:33,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 587 transitions, 9526 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 04:38:33,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:38:33,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:38:33,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:38:36,163 INFO L124 PetriNetUnfolderBase]: 4605/7277 cut-off events. [2024-06-28 04:38:36,163 INFO L125 PetriNetUnfolderBase]: For 659826/659828 co-relation queries the response was YES. [2024-06-28 04:38:36,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54548 conditions, 7277 events. 4605/7277 cut-off events. For 659826/659828 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 45504 event pairs, 1043 based on Foata normal form. 14/7290 useless extension candidates. Maximal degree in co-relation 54376. Up to 6264 conditions per place. [2024-06-28 04:38:36,278 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 503 selfloop transitions, 129 changer transitions 0/637 dead transitions. [2024-06-28 04:38:36,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 637 transitions, 11006 flow [2024-06-28 04:38:36,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:38:36,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:38:36,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-28 04:38:36,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2024-06-28 04:38:36,279 INFO L175 Difference]: Start difference. First operand has 405 places, 587 transitions, 9526 flow. Second operand 10 states and 187 transitions. [2024-06-28 04:38:36,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 637 transitions, 11006 flow [2024-06-28 04:38:39,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 637 transitions, 10734 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-28 04:38:39,185 INFO L231 Difference]: Finished difference. Result has 409 places, 588 transitions, 9545 flow [2024-06-28 04:38:39,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9256, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9545, PETRI_PLACES=409, PETRI_TRANSITIONS=588} [2024-06-28 04:38:39,186 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-28 04:38:39,186 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 588 transitions, 9545 flow [2024-06-28 04:38:39,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 04:38:39,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:38:39,186 INFO 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 04:38:39,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-28 04:38:39,186 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:38:39,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:38:39,187 INFO L85 PathProgramCache]: Analyzing trace with hash -841495486, now seen corresponding path program 3 times [2024-06-28 04:38:39,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:38:39,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555930142] [2024-06-28 04:38:39,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:38:39,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:38:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:38:42,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:38:42,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:38:42,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555930142] [2024-06-28 04:38:42,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555930142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:38:42,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:38:42,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:38:42,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050683208] [2024-06-28 04:38:42,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:38:42,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:38:42,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:38:42,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:38:42,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:38:42,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:38:42,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 588 transitions, 9545 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 04:38:42,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:38:42,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:38:42,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:38:45,264 INFO L124 PetriNetUnfolderBase]: 4633/7317 cut-off events. [2024-06-28 04:38:45,264 INFO L125 PetriNetUnfolderBase]: For 650840/650842 co-relation queries the response was YES. [2024-06-28 04:38:45,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54862 conditions, 7317 events. 4633/7317 cut-off events. For 650840/650842 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 45782 event pairs, 1045 based on Foata normal form. 10/7326 useless extension candidates. Maximal degree in co-relation 54690. Up to 6270 conditions per place. [2024-06-28 04:38:45,369 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 505 selfloop transitions, 131 changer transitions 0/641 dead transitions. [2024-06-28 04:38:45,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 641 transitions, 11051 flow [2024-06-28 04:38:45,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:38:45,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:38:45,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-28 04:38:45,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 04:38:45,371 INFO L175 Difference]: Start difference. First operand has 409 places, 588 transitions, 9545 flow. Second operand 10 states and 190 transitions. [2024-06-28 04:38:45,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 641 transitions, 11051 flow [2024-06-28 04:38:48,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 641 transitions, 10719 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-28 04:38:48,182 INFO L231 Difference]: Finished difference. Result has 410 places, 589 transitions, 9507 flow [2024-06-28 04:38:48,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9213, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9507, PETRI_PLACES=410, PETRI_TRANSITIONS=589} [2024-06-28 04:38:48,182 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-28 04:38:48,182 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 589 transitions, 9507 flow [2024-06-28 04:38:48,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 04:38:48,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:38:48,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:38:48,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-28 04:38:48,183 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:38:48,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:38:48,183 INFO L85 PathProgramCache]: Analyzing trace with hash -459412746, now seen corresponding path program 4 times [2024-06-28 04:38:48,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:38:48,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446285610] [2024-06-28 04:38:48,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:38:48,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:38:48,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:38:51,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:38:51,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:38:51,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446285610] [2024-06-28 04:38:51,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446285610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:38:51,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:38:51,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:38:51,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603844255] [2024-06-28 04:38:51,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:38:51,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:38:51,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:38:51,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:38:51,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:38:51,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:38:51,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 589 transitions, 9507 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 04:38:51,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:38:51,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:38:51,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:38:54,289 INFO L124 PetriNetUnfolderBase]: 4817/7572 cut-off events. [2024-06-28 04:38:54,289 INFO L125 PetriNetUnfolderBase]: For 908031/908031 co-relation queries the response was YES. [2024-06-28 04:38:54,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56416 conditions, 7572 events. 4817/7572 cut-off events. For 908031/908031 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 47356 event pairs, 1093 based on Foata normal form. 56/7627 useless extension candidates. Maximal degree in co-relation 56243. Up to 6538 conditions per place. [2024-06-28 04:38:54,390 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 488 selfloop transitions, 122 changer transitions 16/631 dead transitions. [2024-06-28 04:38:54,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 631 transitions, 10957 flow [2024-06-28 04:38:54,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:38:54,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:38:54,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-28 04:38:54,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-28 04:38:54,391 INFO L175 Difference]: Start difference. First operand has 410 places, 589 transitions, 9507 flow. Second operand 10 states and 181 transitions. [2024-06-28 04:38:54,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 631 transitions, 10957 flow [2024-06-28 04:38:57,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 631 transitions, 10677 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-28 04:38:57,032 INFO L231 Difference]: Finished difference. Result has 412 places, 576 transitions, 9302 flow [2024-06-28 04:38:57,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9227, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9302, PETRI_PLACES=412, PETRI_TRANSITIONS=576} [2024-06-28 04:38:57,032 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-28 04:38:57,033 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 576 transitions, 9302 flow [2024-06-28 04:38:57,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 04:38:57,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:38:57,033 INFO 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 04:38:57,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-28 04:38:57,033 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:38:57,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:38:57,033 INFO L85 PathProgramCache]: Analyzing trace with hash -142005048, now seen corresponding path program 1 times [2024-06-28 04:38:57,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:38:57,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239495911] [2024-06-28 04:38:57,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:38:57,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:38:57,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:39:00,537 INFO 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 04:39:00,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:39:00,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239495911] [2024-06-28 04:39:00,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239495911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:39:00,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:39:00,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:39:00,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682403927] [2024-06-28 04:39:00,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:39:00,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:39:00,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:39:00,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:39:00,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:39:00,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:39:00,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 576 transitions, 9302 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 04:39:00,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:39:00,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:39:00,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:39:03,241 INFO L124 PetriNetUnfolderBase]: 4755/7492 cut-off events. [2024-06-28 04:39:03,241 INFO L125 PetriNetUnfolderBase]: For 904033/904033 co-relation queries the response was YES. [2024-06-28 04:39:03,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55337 conditions, 7492 events. 4755/7492 cut-off events. For 904033/904033 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 46916 event pairs, 1105 based on Foata normal form. 56/7547 useless extension candidates. Maximal degree in co-relation 55163. Up to 6520 conditions per place. [2024-06-28 04:39:03,341 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 483 selfloop transitions, 118 changer transitions 15/621 dead transitions. [2024-06-28 04:39:03,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 621 transitions, 10740 flow [2024-06-28 04:39:03,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:39:03,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:39:03,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 205 transitions. [2024-06-28 04:39:03,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40674603174603174 [2024-06-28 04:39:03,343 INFO L175 Difference]: Start difference. First operand has 412 places, 576 transitions, 9302 flow. Second operand 12 states and 205 transitions. [2024-06-28 04:39:03,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 621 transitions, 10740 flow [2024-06-28 04:39:06,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 621 transitions, 10481 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-28 04:39:06,135 INFO L231 Difference]: Finished difference. Result has 416 places, 564 transitions, 9126 flow [2024-06-28 04:39:06,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9043, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9126, PETRI_PLACES=416, PETRI_TRANSITIONS=564} [2024-06-28 04:39:06,135 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-28 04:39:06,136 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 564 transitions, 9126 flow [2024-06-28 04:39:06,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 04:39:06,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:39:06,136 INFO 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 04:39:06,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-28 04:39:06,136 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:39:06,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:39:06,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1941879402, now seen corresponding path program 2 times [2024-06-28 04:39:06,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:39:06,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304259340] [2024-06-28 04:39:06,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:39:06,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:39:06,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:39:09,221 INFO 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 04:39:09,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:39:09,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304259340] [2024-06-28 04:39:09,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304259340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:39:09,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:39:09,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:39:09,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483139878] [2024-06-28 04:39:09,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:39:09,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:39:09,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:39:09,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:39:09,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:39:09,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:39:09,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 564 transitions, 9126 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 04:39:09,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:39:09,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:39:09,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:39:11,663 INFO L124 PetriNetUnfolderBase]: 4691/7410 cut-off events. [2024-06-28 04:39:11,663 INFO L125 PetriNetUnfolderBase]: For 871009/871009 co-relation queries the response was YES. [2024-06-28 04:39:11,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54776 conditions, 7410 events. 4691/7410 cut-off events. For 871009/871009 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 46480 event pairs, 1055 based on Foata normal form. 48/7457 useless extension candidates. Maximal degree in co-relation 54601. Up to 6226 conditions per place. [2024-06-28 04:39:11,754 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 479 selfloop transitions, 107 changer transitions 26/617 dead transitions. [2024-06-28 04:39:11,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 617 transitions, 10668 flow [2024-06-28 04:39:11,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:39:11,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:39:11,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 209 transitions. [2024-06-28 04:39:11,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146825396825397 [2024-06-28 04:39:11,756 INFO L175 Difference]: Start difference. First operand has 416 places, 564 transitions, 9126 flow. Second operand 12 states and 209 transitions. [2024-06-28 04:39:11,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 617 transitions, 10668 flow [2024-06-28 04:39:14,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 617 transitions, 10335 flow, removed 10 selfloop flow, removed 14 redundant places. [2024-06-28 04:39:14,488 INFO L231 Difference]: Finished difference. Result has 415 places, 547 transitions, 8666 flow [2024-06-28 04:39:14,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8793, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8666, PETRI_PLACES=415, PETRI_TRANSITIONS=547} [2024-06-28 04:39:14,489 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-28 04:39:14,489 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 547 transitions, 8666 flow [2024-06-28 04:39:14,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 04:39:14,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:39:14,489 INFO 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 04:39:14,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-28 04:39:14,490 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:39:14,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:39:14,490 INFO L85 PathProgramCache]: Analyzing trace with hash 2146013722, now seen corresponding path program 5 times [2024-06-28 04:39:14,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:39:14,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935029967] [2024-06-28 04:39:14,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:39:14,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:39:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:39:18,019 INFO 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 04:39:18,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:39:18,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935029967] [2024-06-28 04:39:18,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935029967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:39:18,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:39:18,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:39:18,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54410958] [2024-06-28 04:39:18,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:39:18,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:39:18,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:39:18,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:39:18,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:39:18,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:39:18,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 547 transitions, 8666 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 04:39:18,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:39:18,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:39:18,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:39:20,216 INFO L124 PetriNetUnfolderBase]: 4487/7104 cut-off events. [2024-06-28 04:39:20,216 INFO L125 PetriNetUnfolderBase]: For 838162/838162 co-relation queries the response was YES. [2024-06-28 04:39:20,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51577 conditions, 7104 events. 4487/7104 cut-off events. For 838162/838162 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 44289 event pairs, 1031 based on Foata normal form. 48/7151 useless extension candidates. Maximal degree in co-relation 51401. Up to 6048 conditions per place. [2024-06-28 04:39:20,486 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 476 selfloop transitions, 88 changer transitions 25/594 dead transitions. [2024-06-28 04:39:20,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 594 transitions, 10086 flow [2024-06-28 04:39:20,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:39:20,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:39:20,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-28 04:39:20,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-28 04:39:20,487 INFO L175 Difference]: Start difference. First operand has 415 places, 547 transitions, 8666 flow. Second operand 10 states and 185 transitions. [2024-06-28 04:39:20,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 594 transitions, 10086 flow [2024-06-28 04:39:23,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 594 transitions, 9706 flow, removed 30 selfloop flow, removed 21 redundant places. [2024-06-28 04:39:23,474 INFO L231 Difference]: Finished difference. Result has 404 places, 528 transitions, 7977 flow [2024-06-28 04:39:23,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8286, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7977, PETRI_PLACES=404, PETRI_TRANSITIONS=528} [2024-06-28 04:39:23,475 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-28 04:39:23,475 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 528 transitions, 7977 flow [2024-06-28 04:39:23,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 04:39:23,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:39:23,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:39:23,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-28 04:39:23,476 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:39:23,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:39:23,477 INFO L85 PathProgramCache]: Analyzing trace with hash 194918700, now seen corresponding path program 7 times [2024-06-28 04:39:23,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:39:23,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801609775] [2024-06-28 04:39:23,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:39:23,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:39:23,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:39:26,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:39:26,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:39:26,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801609775] [2024-06-28 04:39:26,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801609775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:39:26,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:39:26,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:39:26,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340423583] [2024-06-28 04:39:26,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:39:26,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:39:26,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:39:26,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:39:26,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:39:26,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:39:26,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 528 transitions, 7977 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:39:26,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:39:26,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:39:26,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:39:29,322 INFO L124 PetriNetUnfolderBase]: 4275/6791 cut-off events. [2024-06-28 04:39:29,322 INFO L125 PetriNetUnfolderBase]: For 626961/626961 co-relation queries the response was YES. [2024-06-28 04:39:29,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49303 conditions, 6791 events. 4275/6791 cut-off events. For 626961/626961 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 42243 event pairs, 897 based on Foata normal form. 8/6798 useless extension candidates. Maximal degree in co-relation 49127. Up to 5490 conditions per place. [2024-06-28 04:39:29,615 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 451 selfloop transitions, 118 changer transitions 0/574 dead transitions. [2024-06-28 04:39:29,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 574 transitions, 9539 flow [2024-06-28 04:39:29,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:39:29,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:39:29,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-28 04:39:29,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 04:39:29,616 INFO L175 Difference]: Start difference. First operand has 404 places, 528 transitions, 7977 flow. Second operand 9 states and 168 transitions. [2024-06-28 04:39:29,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 574 transitions, 9539 flow [2024-06-28 04:39:32,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 574 transitions, 9302 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-28 04:39:32,479 INFO L231 Difference]: Finished difference. Result has 404 places, 529 transitions, 8024 flow [2024-06-28 04:39:32,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7740, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8024, PETRI_PLACES=404, PETRI_TRANSITIONS=529} [2024-06-28 04:39:32,479 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-28 04:39:32,479 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 529 transitions, 8024 flow [2024-06-28 04:39:32,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:39:32,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:39:32,480 INFO 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 04:39:32,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-28 04:39:32,480 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:39:32,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:39:32,481 INFO L85 PathProgramCache]: Analyzing trace with hash -800533158, now seen corresponding path program 8 times [2024-06-28 04:39:32,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:39:32,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314060087] [2024-06-28 04:39:32,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:39:32,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:39:32,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:39:35,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:39:35,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:39:35,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314060087] [2024-06-28 04:39:35,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314060087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:39:35,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:39:35,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:39:35,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995068964] [2024-06-28 04:39:35,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:39:35,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:39:35,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:39:35,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:39:35,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:39:35,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:39:35,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 529 transitions, 8024 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:39:35,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:39:35,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:39:35,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:39:37,786 INFO L124 PetriNetUnfolderBase]: 4349/6913 cut-off events. [2024-06-28 04:39:37,787 INFO L125 PetriNetUnfolderBase]: For 640029/640029 co-relation queries the response was YES. [2024-06-28 04:39:37,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50346 conditions, 6913 events. 4349/6913 cut-off events. For 640029/640029 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 43262 event pairs, 1085 based on Foata normal form. 8/6920 useless extension candidates. Maximal degree in co-relation 50169. Up to 6204 conditions per place. [2024-06-28 04:39:37,887 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 479 selfloop transitions, 90 changer transitions 0/574 dead transitions. [2024-06-28 04:39:37,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 574 transitions, 9431 flow [2024-06-28 04:39:37,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:39:37,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:39:37,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 04:39:37,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-28 04:39:37,890 INFO L175 Difference]: Start difference. First operand has 404 places, 529 transitions, 8024 flow. Second operand 9 states and 164 transitions. [2024-06-28 04:39:37,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 574 transitions, 9431 flow [2024-06-28 04:39:41,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 574 transitions, 9217 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-28 04:39:41,124 INFO L231 Difference]: Finished difference. Result has 406 places, 534 transitions, 8128 flow [2024-06-28 04:39:41,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7816, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8128, PETRI_PLACES=406, PETRI_TRANSITIONS=534} [2024-06-28 04:39:41,124 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 363 predicate places. [2024-06-28 04:39:41,124 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 534 transitions, 8128 flow [2024-06-28 04:39:41,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:39:41,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:39:41,125 INFO 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 04:39:41,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-28 04:39:41,125 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:39:41,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:39:41,126 INFO L85 PathProgramCache]: Analyzing trace with hash 668903724, now seen corresponding path program 9 times [2024-06-28 04:39:41,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:39:41,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69051997] [2024-06-28 04:39:41,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:39:41,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:39:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:39:44,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:39:44,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:39:44,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69051997] [2024-06-28 04:39:44,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69051997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:39:44,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:39:44,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:39:44,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711396476] [2024-06-28 04:39:44,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:39:44,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:39:44,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:39:44,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:39:44,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:39:44,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:39:44,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 534 transitions, 8128 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:39:44,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:39:44,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:39:44,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:39:46,617 INFO L124 PetriNetUnfolderBase]: 4377/6942 cut-off events. [2024-06-28 04:39:46,618 INFO L125 PetriNetUnfolderBase]: For 620263/620263 co-relation queries the response was YES. [2024-06-28 04:39:46,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50173 conditions, 6942 events. 4377/6942 cut-off events. For 620263/620263 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 43345 event pairs, 1067 based on Foata normal form. 8/6949 useless extension candidates. Maximal degree in co-relation 49996. Up to 6326 conditions per place. [2024-06-28 04:39:46,721 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 482 selfloop transitions, 82 changer transitions 0/569 dead transitions. [2024-06-28 04:39:46,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 569 transitions, 9442 flow [2024-06-28 04:39:46,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:39:46,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:39:46,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-28 04:39:46,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-28 04:39:46,723 INFO L175 Difference]: Start difference. First operand has 406 places, 534 transitions, 8128 flow. Second operand 9 states and 157 transitions. [2024-06-28 04:39:46,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 569 transitions, 9442 flow [2024-06-28 04:39:49,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 569 transitions, 9312 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 04:39:49,619 INFO L231 Difference]: Finished difference. Result has 410 places, 536 transitions, 8251 flow [2024-06-28 04:39:49,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7999, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8251, PETRI_PLACES=410, PETRI_TRANSITIONS=536} [2024-06-28 04:39:49,620 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-28 04:39:49,620 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 536 transitions, 8251 flow [2024-06-28 04:39:49,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:39:49,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:39:49,620 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, 1, 1] [2024-06-28 04:39:49,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-28 04:39:49,621 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:39:49,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:39:49,621 INFO L85 PathProgramCache]: Analyzing trace with hash 283576716, now seen corresponding path program 9 times [2024-06-28 04:39:49,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:39:49,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383305259] [2024-06-28 04:39:49,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:39:49,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:39:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:39:52,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:39:52,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:39:52,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383305259] [2024-06-28 04:39:52,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383305259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:39:52,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:39:52,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:39:52,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223532275] [2024-06-28 04:39:52,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:39:52,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:39:52,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:39:52,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:39:52,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:39:52,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:39:52,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 536 transitions, 8251 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:39:52,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:39:52,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:39:52,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:39:55,052 INFO L124 PetriNetUnfolderBase]: 4353/6921 cut-off events. [2024-06-28 04:39:55,052 INFO L125 PetriNetUnfolderBase]: For 568069/568069 co-relation queries the response was YES. [2024-06-28 04:39:55,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48960 conditions, 6921 events. 4353/6921 cut-off events. For 568069/568069 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 43389 event pairs, 1058 based on Foata normal form. 8/6928 useless extension candidates. Maximal degree in co-relation 48783. Up to 6056 conditions per place. [2024-06-28 04:39:55,148 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 428 selfloop transitions, 143 changer transitions 0/576 dead transitions. [2024-06-28 04:39:55,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 576 transitions, 9725 flow [2024-06-28 04:39:55,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:39:55,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:39:55,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-28 04:39:55,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 04:39:55,154 INFO L175 Difference]: Start difference. First operand has 410 places, 536 transitions, 8251 flow. Second operand 9 states and 168 transitions. [2024-06-28 04:39:55,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 576 transitions, 9725 flow [2024-06-28 04:39:57,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 576 transitions, 9547 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-28 04:39:57,805 INFO L231 Difference]: Finished difference. Result has 413 places, 536 transitions, 8387 flow [2024-06-28 04:39:57,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8075, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8387, PETRI_PLACES=413, PETRI_TRANSITIONS=536} [2024-06-28 04:39:57,805 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-28 04:39:57,805 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 536 transitions, 8387 flow [2024-06-28 04:39:57,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:39:57,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:39:57,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:39:57,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-28 04:39:57,806 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:39:57,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:39:57,806 INFO L85 PathProgramCache]: Analyzing trace with hash 402481548, now seen corresponding path program 10 times [2024-06-28 04:39:57,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:39:57,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462866285] [2024-06-28 04:39:57,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:39:57,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:39:57,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:40:00,750 INFO 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 04:40:00,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:40:00,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462866285] [2024-06-28 04:40:00,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462866285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:40:00,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:40:00,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:40:00,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166842319] [2024-06-28 04:40:00,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:40:00,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:40:00,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:40:00,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:40:00,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:40:00,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:40:00,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 536 transitions, 8387 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:40:00,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:40:00,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:40:00,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:40:03,088 INFO L124 PetriNetUnfolderBase]: 4457/7074 cut-off events. [2024-06-28 04:40:03,089 INFO L125 PetriNetUnfolderBase]: For 614388/614390 co-relation queries the response was YES. [2024-06-28 04:40:03,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51152 conditions, 7074 events. 4457/7074 cut-off events. For 614388/614390 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 44398 event pairs, 872 based on Foata normal form. 10/7083 useless extension candidates. Maximal degree in co-relation 50976. Up to 5036 conditions per place. [2024-06-28 04:40:03,196 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 300 selfloop transitions, 287 changer transitions 0/592 dead transitions. [2024-06-28 04:40:03,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 592 transitions, 10630 flow [2024-06-28 04:40:03,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:40:03,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:40:03,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-28 04:40:03,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-28 04:40:03,203 INFO L175 Difference]: Start difference. First operand has 413 places, 536 transitions, 8387 flow. Second operand 9 states and 173 transitions. [2024-06-28 04:40:03,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 592 transitions, 10630 flow [2024-06-28 04:40:05,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 592 transitions, 10348 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-28 04:40:05,568 INFO L231 Difference]: Finished difference. Result has 415 places, 548 transitions, 8995 flow [2024-06-28 04:40:05,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8111, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8995, PETRI_PLACES=415, PETRI_TRANSITIONS=548} [2024-06-28 04:40:05,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-28 04:40:05,568 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 548 transitions, 8995 flow [2024-06-28 04:40:05,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:40:05,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:40:05,569 INFO 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 04:40:05,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-28 04:40:05,570 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:40:05,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:40:05,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1550431784, now seen corresponding path program 11 times [2024-06-28 04:40:05,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:40:05,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790183002] [2024-06-28 04:40:05,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:40:05,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:40:05,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:40:08,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:40:08,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:40:08,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790183002] [2024-06-28 04:40:08,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790183002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:40:08,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:40:08,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:40:08,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406353955] [2024-06-28 04:40:08,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:40:08,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:40:08,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:40:08,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:40:08,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:40:08,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:40:08,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 548 transitions, 8995 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:40:08,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:40:08,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:40:08,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:40:11,482 INFO L124 PetriNetUnfolderBase]: 4529/7192 cut-off events. [2024-06-28 04:40:11,482 INFO L125 PetriNetUnfolderBase]: For 642633/642635 co-relation queries the response was YES. [2024-06-28 04:40:11,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53152 conditions, 7192 events. 4529/7192 cut-off events. For 642633/642635 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 45250 event pairs, 840 based on Foata normal form. 10/7201 useless extension candidates. Maximal degree in co-relation 52976. Up to 5092 conditions per place. [2024-06-28 04:40:11,587 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 305 selfloop transitions, 288 changer transitions 0/598 dead transitions. [2024-06-28 04:40:11,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 598 transitions, 11178 flow [2024-06-28 04:40:11,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:40:11,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:40:11,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-28 04:40:11,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 04:40:11,591 INFO L175 Difference]: Start difference. First operand has 415 places, 548 transitions, 8995 flow. Second operand 9 states and 171 transitions. [2024-06-28 04:40:11,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 598 transitions, 11178 flow [2024-06-28 04:40:14,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 598 transitions, 10434 flow, removed 137 selfloop flow, removed 8 redundant places. [2024-06-28 04:40:14,446 INFO L231 Difference]: Finished difference. Result has 416 places, 557 transitions, 9087 flow [2024-06-28 04:40:14,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8344, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9087, PETRI_PLACES=416, PETRI_TRANSITIONS=557} [2024-06-28 04:40:14,448 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-28 04:40:14,448 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 557 transitions, 9087 flow [2024-06-28 04:40:14,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:40:14,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:40:14,449 INFO 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 04:40:14,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-28 04:40:14,450 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:40:14,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:40:14,450 INFO L85 PathProgramCache]: Analyzing trace with hash 698056938, now seen corresponding path program 12 times [2024-06-28 04:40:14,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:40:14,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041608020] [2024-06-28 04:40:14,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:40:14,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:40:14,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:40:17,706 INFO 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 04:40:17,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:40:17,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041608020] [2024-06-28 04:40:17,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041608020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:40:17,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:40:17,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:40:17,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994705108] [2024-06-28 04:40:17,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:40:17,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:40:17,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:40:17,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:40:17,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:40:17,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:40:17,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 557 transitions, 9087 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:40:17,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:40:17,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:40:17,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:40:20,357 INFO L124 PetriNetUnfolderBase]: 4505/7166 cut-off events. [2024-06-28 04:40:20,357 INFO L125 PetriNetUnfolderBase]: For 596778/596780 co-relation queries the response was YES. [2024-06-28 04:40:20,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51222 conditions, 7166 events. 4505/7166 cut-off events. For 596778/596780 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 45170 event pairs, 840 based on Foata normal form. 10/7175 useless extension candidates. Maximal degree in co-relation 51048. Up to 5076 conditions per place. [2024-06-28 04:40:20,445 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 294 selfloop transitions, 297 changer transitions 0/596 dead transitions. [2024-06-28 04:40:20,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 596 transitions, 10816 flow [2024-06-28 04:40:20,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:40:20,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:40:20,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-28 04:40:20,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 04:40:20,447 INFO L175 Difference]: Start difference. First operand has 416 places, 557 transitions, 9087 flow. Second operand 9 states and 168 transitions. [2024-06-28 04:40:20,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 596 transitions, 10816 flow [2024-06-28 04:40:23,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 596 transitions, 10343 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-28 04:40:23,127 INFO L231 Difference]: Finished difference. Result has 420 places, 557 transitions, 9226 flow [2024-06-28 04:40:23,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8618, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9226, PETRI_PLACES=420, PETRI_TRANSITIONS=557} [2024-06-28 04:40:23,128 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 377 predicate places. [2024-06-28 04:40:23,128 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 557 transitions, 9226 flow [2024-06-28 04:40:23,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:40:23,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:40:23,129 INFO 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 04:40:23,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-28 04:40:23,129 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:40:23,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:40:23,129 INFO L85 PathProgramCache]: Analyzing trace with hash -215363658, now seen corresponding path program 13 times [2024-06-28 04:40:23,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:40:23,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592860129] [2024-06-28 04:40:23,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:40:23,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:40:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:40:26,440 INFO 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 04:40:26,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:40:26,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592860129] [2024-06-28 04:40:26,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592860129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:40:26,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:40:26,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:40:26,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714930312] [2024-06-28 04:40:26,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:40:26,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:40:26,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:40:26,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:40:26,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:40:26,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:40:26,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 557 transitions, 9226 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:40:26,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:40:26,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:40:26,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:40:28,946 INFO L124 PetriNetUnfolderBase]: 4557/7226 cut-off events. [2024-06-28 04:40:28,946 INFO L125 PetriNetUnfolderBase]: For 603003/603003 co-relation queries the response was YES. [2024-06-28 04:40:29,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51982 conditions, 7226 events. 4557/7226 cut-off events. For 603003/603003 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 45518 event pairs, 1097 based on Foata normal form. 4/7229 useless extension candidates. Maximal degree in co-relation 51808. Up to 6440 conditions per place. [2024-06-28 04:40:29,049 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 468 selfloop transitions, 123 changer transitions 0/596 dead transitions. [2024-06-28 04:40:29,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 596 transitions, 10824 flow [2024-06-28 04:40:29,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:40:29,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:40:29,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-28 04:40:29,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39826839826839827 [2024-06-28 04:40:29,051 INFO L175 Difference]: Start difference. First operand has 420 places, 557 transitions, 9226 flow. Second operand 11 states and 184 transitions. [2024-06-28 04:40:29,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 596 transitions, 10824 flow [2024-06-28 04:40:31,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 596 transitions, 10190 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-28 04:40:31,690 INFO L231 Difference]: Finished difference. Result has 422 places, 563 transitions, 8976 flow [2024-06-28 04:40:31,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8606, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8976, PETRI_PLACES=422, PETRI_TRANSITIONS=563} [2024-06-28 04:40:31,691 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-28 04:40:31,691 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 563 transitions, 8976 flow [2024-06-28 04:40:31,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:40:31,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:40:31,691 INFO 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 04:40:31,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-28 04:40:31,692 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:40:31,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:40:31,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1424722570, now seen corresponding path program 14 times [2024-06-28 04:40:31,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:40:31,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327751358] [2024-06-28 04:40:31,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:40:31,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:40:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:40:34,790 INFO 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 04:40:34,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:40:34,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327751358] [2024-06-28 04:40:34,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327751358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:40:34,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:40:34,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:40:34,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452366155] [2024-06-28 04:40:34,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:40:34,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:40:34,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:40:34,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:40:34,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:40:34,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:40:34,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 563 transitions, 8976 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:40:34,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:40:34,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:40:34,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:40:37,323 INFO L124 PetriNetUnfolderBase]: 4577/7264 cut-off events. [2024-06-28 04:40:37,324 INFO L125 PetriNetUnfolderBase]: For 599415/599415 co-relation queries the response was YES. [2024-06-28 04:40:37,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51256 conditions, 7264 events. 4577/7264 cut-off events. For 599415/599415 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 45870 event pairs, 1099 based on Foata normal form. 4/7267 useless extension candidates. Maximal degree in co-relation 51082. Up to 6456 conditions per place. [2024-06-28 04:40:37,427 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 469 selfloop transitions, 122 changer transitions 0/596 dead transitions. [2024-06-28 04:40:37,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 596 transitions, 10508 flow [2024-06-28 04:40:37,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:40:37,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:40:37,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-28 04:40:37,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-28 04:40:37,428 INFO L175 Difference]: Start difference. First operand has 422 places, 563 transitions, 8976 flow. Second operand 9 states and 159 transitions. [2024-06-28 04:40:37,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 596 transitions, 10508 flow [2024-06-28 04:40:40,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 596 transitions, 10319 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-28 04:40:40,149 INFO L231 Difference]: Finished difference. Result has 423 places, 566 transitions, 9103 flow [2024-06-28 04:40:40,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8797, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9103, PETRI_PLACES=423, PETRI_TRANSITIONS=566} [2024-06-28 04:40:40,161 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-28 04:40:40,161 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 566 transitions, 9103 flow [2024-06-28 04:40:40,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:40:40,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:40:40,161 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, 1] [2024-06-28 04:40:40,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-28 04:40:40,161 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:40:40,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:40:40,162 INFO L85 PathProgramCache]: Analyzing trace with hash -414665448, now seen corresponding path program 15 times [2024-06-28 04:40:40,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:40:40,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465654478] [2024-06-28 04:40:40,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:40:40,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:40:40,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:40:43,383 INFO 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 04:40:43,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:40:43,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465654478] [2024-06-28 04:40:43,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465654478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:40:43,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:40:43,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:40:43,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727673741] [2024-06-28 04:40:43,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:40:43,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:40:43,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:40:43,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:40:43,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:40:43,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:40:43,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 566 transitions, 9103 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:40:43,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:40:43,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:40:43,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:40:45,719 INFO L124 PetriNetUnfolderBase]: 4565/7246 cut-off events. [2024-06-28 04:40:45,720 INFO L125 PetriNetUnfolderBase]: For 577457/577457 co-relation queries the response was YES. [2024-06-28 04:40:45,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51003 conditions, 7246 events. 4565/7246 cut-off events. For 577457/577457 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 45686 event pairs, 1105 based on Foata normal form. 4/7249 useless extension candidates. Maximal degree in co-relation 50828. Up to 6448 conditions per place. [2024-06-28 04:40:45,809 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 469 selfloop transitions, 121 changer transitions 0/595 dead transitions. [2024-06-28 04:40:45,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 595 transitions, 10365 flow [2024-06-28 04:40:45,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:40:45,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:40:45,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-28 04:40:45,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-28 04:40:45,811 INFO L175 Difference]: Start difference. First operand has 423 places, 566 transitions, 9103 flow. Second operand 9 states and 158 transitions. [2024-06-28 04:40:45,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 595 transitions, 10365 flow [2024-06-28 04:40:49,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 595 transitions, 10092 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-28 04:40:49,042 INFO L231 Difference]: Finished difference. Result has 425 places, 566 transitions, 9082 flow [2024-06-28 04:40:49,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8830, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9082, PETRI_PLACES=425, PETRI_TRANSITIONS=566} [2024-06-28 04:40:49,043 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 382 predicate places. [2024-06-28 04:40:49,043 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 566 transitions, 9082 flow [2024-06-28 04:40:49,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:40:49,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:40:49,043 INFO 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 04:40:49,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-28 04:40:49,044 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:40:49,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:40:49,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1575998520, now seen corresponding path program 10 times [2024-06-28 04:40:49,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:40:49,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280728773] [2024-06-28 04:40:49,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:40:49,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:40:49,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:40:53,562 INFO 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 04:40:53,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:40:53,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280728773] [2024-06-28 04:40:53,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280728773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:40:53,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:40:53,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:40:53,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160123619] [2024-06-28 04:40:53,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:40:53,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:40:53,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:40:53,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:40:53,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:40:53,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:40:53,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 566 transitions, 9082 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:40:53,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:40:53,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:40:53,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:40:55,914 INFO L124 PetriNetUnfolderBase]: 4547/7214 cut-off events. [2024-06-28 04:40:55,914 INFO L125 PetriNetUnfolderBase]: For 556113/556113 co-relation queries the response was YES. [2024-06-28 04:40:55,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49869 conditions, 7214 events. 4547/7214 cut-off events. For 556113/556113 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 45420 event pairs, 1134 based on Foata normal form. 8/7214 useless extension candidates. Maximal degree in co-relation 49694. Up to 6562 conditions per place. [2024-06-28 04:40:56,021 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 507 selfloop transitions, 79 changer transitions 0/591 dead transitions. [2024-06-28 04:40:56,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 591 transitions, 10362 flow [2024-06-28 04:40:56,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:40:56,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:40:56,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-28 04:40:56,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-28 04:40:56,022 INFO L175 Difference]: Start difference. First operand has 425 places, 566 transitions, 9082 flow. Second operand 9 states and 147 transitions. [2024-06-28 04:40:56,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 591 transitions, 10362 flow [2024-06-28 04:40:59,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 591 transitions, 10066 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-28 04:40:59,282 INFO L231 Difference]: Finished difference. Result has 424 places, 566 transitions, 8948 flow [2024-06-28 04:40:59,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8786, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8948, PETRI_PLACES=424, PETRI_TRANSITIONS=566} [2024-06-28 04:40:59,283 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-28 04:40:59,283 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 566 transitions, 8948 flow [2024-06-28 04:40:59,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:40:59,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:40:59,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:40:59,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-28 04:40:59,283 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:40:59,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:40:59,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1090618810, now seen corresponding path program 16 times [2024-06-28 04:40:59,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:40:59,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924068528] [2024-06-28 04:40:59,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:40:59,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:40:59,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:41:02,462 INFO 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 04:41:02,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:41:02,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924068528] [2024-06-28 04:41:02,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924068528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:41:02,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:41:02,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:41:02,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699283857] [2024-06-28 04:41:02,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:41:02,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:41:02,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:41:02,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:41:02,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:41:02,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:41:02,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 566 transitions, 8948 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:41:02,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:41:02,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:41:02,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:41:05,056 INFO L124 PetriNetUnfolderBase]: 4587/7290 cut-off events. [2024-06-28 04:41:05,056 INFO L125 PetriNetUnfolderBase]: For 557406/557406 co-relation queries the response was YES. [2024-06-28 04:41:05,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50087 conditions, 7290 events. 4587/7290 cut-off events. For 557406/557406 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 46053 event pairs, 961 based on Foata normal form. 8/7290 useless extension candidates. Maximal degree in co-relation 49912. Up to 5130 conditions per place. [2024-06-28 04:41:05,147 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 303 selfloop transitions, 301 changer transitions 0/609 dead transitions. [2024-06-28 04:41:05,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 609 transitions, 10839 flow [2024-06-28 04:41:05,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:41:05,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:41:05,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-28 04:41:05,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-28 04:41:05,148 INFO L175 Difference]: Start difference. First operand has 424 places, 566 transitions, 8948 flow. Second operand 9 states and 167 transitions. [2024-06-28 04:41:05,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 609 transitions, 10839 flow [2024-06-28 04:41:08,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 609 transitions, 10558 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-28 04:41:08,029 INFO L231 Difference]: Finished difference. Result has 426 places, 572 transitions, 9427 flow [2024-06-28 04:41:08,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8667, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9427, PETRI_PLACES=426, PETRI_TRANSITIONS=572} [2024-06-28 04:41:08,030 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-28 04:41:08,030 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 572 transitions, 9427 flow [2024-06-28 04:41:08,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:41:08,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:41:08,030 INFO 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 04:41:08,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-28 04:41:08,030 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:41:08,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:41:08,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1386194200, now seen corresponding path program 17 times [2024-06-28 04:41:08,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:41:08,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580411570] [2024-06-28 04:41:08,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:41:08,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:41:08,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:41:11,508 INFO 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 04:41:11,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:41:11,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580411570] [2024-06-28 04:41:11,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580411570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:41:11,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:41:11,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:41:11,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740460039] [2024-06-28 04:41:11,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:41:11,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:41:11,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:41:11,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:41:11,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:41:11,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:41:11,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 572 transitions, 9427 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:41:11,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:41:11,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:41:11,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:41:14,020 INFO L124 PetriNetUnfolderBase]: 4659/7406 cut-off events. [2024-06-28 04:41:14,020 INFO L125 PetriNetUnfolderBase]: For 593429/593429 co-relation queries the response was YES. [2024-06-28 04:41:14,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52269 conditions, 7406 events. 4659/7406 cut-off events. For 593429/593429 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 46904 event pairs, 957 based on Foata normal form. 8/7406 useless extension candidates. Maximal degree in co-relation 52094. Up to 5186 conditions per place. [2024-06-28 04:41:14,124 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 307 selfloop transitions, 304 changer transitions 0/616 dead transitions. [2024-06-28 04:41:14,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 616 transitions, 11630 flow [2024-06-28 04:41:14,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:41:14,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:41:14,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-28 04:41:14,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-28 04:41:14,126 INFO L175 Difference]: Start difference. First operand has 426 places, 572 transitions, 9427 flow. Second operand 9 states and 165 transitions. [2024-06-28 04:41:14,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 616 transitions, 11630 flow [2024-06-28 04:41:17,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 616 transitions, 10502 flow, removed 106 selfloop flow, removed 9 redundant places. [2024-06-28 04:41:17,277 INFO L231 Difference]: Finished difference. Result has 426 places, 581 transitions, 9157 flow [2024-06-28 04:41:17,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8386, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9157, PETRI_PLACES=426, PETRI_TRANSITIONS=581} [2024-06-28 04:41:17,290 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-28 04:41:17,290 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 581 transitions, 9157 flow [2024-06-28 04:41:17,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:41:17,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:41:17,290 INFO 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 04:41:17,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-28 04:41:17,290 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:41:17,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:41:17,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1098950680, now seen corresponding path program 18 times [2024-06-28 04:41:17,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:41:17,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990805946] [2024-06-28 04:41:17,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:41:17,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:41:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:41:20,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:41:20,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:41:20,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990805946] [2024-06-28 04:41:20,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990805946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:41:20,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:41:20,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:41:20,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466175725] [2024-06-28 04:41:20,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:41:20,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:41:20,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:41:20,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:41:20,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:41:20,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:41:20,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 581 transitions, 9157 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:41:20,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:41:20,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:41:20,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:41:23,029 INFO L124 PetriNetUnfolderBase]: 4635/7374 cut-off events. [2024-06-28 04:41:23,029 INFO L125 PetriNetUnfolderBase]: For 545976/545976 co-relation queries the response was YES. [2024-06-28 04:41:23,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50173 conditions, 7374 events. 4635/7374 cut-off events. For 545976/545976 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 46773 event pairs, 953 based on Foata normal form. 8/7374 useless extension candidates. Maximal degree in co-relation 49998. Up to 5170 conditions per place. [2024-06-28 04:41:23,136 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 309 selfloop transitions, 302 changer transitions 0/616 dead transitions. [2024-06-28 04:41:23,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 616 transitions, 10916 flow [2024-06-28 04:41:23,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:41:23,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:41:23,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 04:41:23,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-28 04:41:23,137 INFO L175 Difference]: Start difference. First operand has 426 places, 581 transitions, 9157 flow. Second operand 9 states and 166 transitions. [2024-06-28 04:41:23,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 616 transitions, 10916 flow [2024-06-28 04:41:25,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 616 transitions, 10223 flow, removed 75 selfloop flow, removed 5 redundant places. [2024-06-28 04:41:25,532 INFO L231 Difference]: Finished difference. Result has 430 places, 581 transitions, 9078 flow [2024-06-28 04:41:25,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8464, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9078, PETRI_PLACES=430, PETRI_TRANSITIONS=581} [2024-06-28 04:41:25,533 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-28 04:41:25,533 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 581 transitions, 9078 flow [2024-06-28 04:41:25,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:41:25,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:41:25,533 INFO 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 04:41:25,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-28 04:41:25,533 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:41:25,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:41:25,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1545220470, now seen corresponding path program 19 times [2024-06-28 04:41:25,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:41:25,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808910836] [2024-06-28 04:41:25,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:41:25,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:41:25,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:41:28,597 INFO 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 04:41:28,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:41:28,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808910836] [2024-06-28 04:41:28,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808910836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:41:28,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:41:28,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:41:28,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122717140] [2024-06-28 04:41:28,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:41:28,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:41:28,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:41:28,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:41:28,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:41:28,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:41:28,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 581 transitions, 9078 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:41:28,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:41:28,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:41:28,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:41:30,994 INFO L124 PetriNetUnfolderBase]: 4655/7439 cut-off events. [2024-06-28 04:41:30,995 INFO L125 PetriNetUnfolderBase]: For 535208/535208 co-relation queries the response was YES. [2024-06-28 04:41:31,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50157 conditions, 7439 events. 4655/7439 cut-off events. For 535208/535208 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 47749 event pairs, 1622 based on Foata normal form. 4/7442 useless extension candidates. Maximal degree in co-relation 49981. Up to 6899 conditions per place. [2024-06-28 04:41:31,089 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 573 selfloop transitions, 33 changer transitions 0/611 dead transitions. [2024-06-28 04:41:31,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 611 transitions, 10426 flow [2024-06-28 04:41:31,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:41:31,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:41:31,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-28 04:41:31,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-28 04:41:31,091 INFO L175 Difference]: Start difference. First operand has 430 places, 581 transitions, 9078 flow. Second operand 9 states and 149 transitions. [2024-06-28 04:41:31,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 611 transitions, 10426 flow [2024-06-28 04:41:33,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 611 transitions, 9800 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-28 04:41:33,912 INFO L231 Difference]: Finished difference. Result has 431 places, 584 transitions, 8590 flow [2024-06-28 04:41:33,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8458, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8590, PETRI_PLACES=431, PETRI_TRANSITIONS=584} [2024-06-28 04:41:33,913 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 388 predicate places. [2024-06-28 04:41:33,913 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 584 transitions, 8590 flow [2024-06-28 04:41:33,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:41:33,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:41:33,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:41:33,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-28 04:41:33,913 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:41:33,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:41:33,914 INFO L85 PathProgramCache]: Analyzing trace with hash -541330586, now seen corresponding path program 20 times [2024-06-28 04:41:33,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:41:33,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660829945] [2024-06-28 04:41:33,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:41:33,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:41:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:41:37,163 INFO 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 04:41:37,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:41:37,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660829945] [2024-06-28 04:41:37,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660829945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:41:37,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:41:37,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:41:37,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224798779] [2024-06-28 04:41:37,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:41:37,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:41:37,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:41:37,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:41:37,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:41:37,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:41:37,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 584 transitions, 8590 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:41:37,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:41:37,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:41:37,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:41:39,692 INFO L124 PetriNetUnfolderBase]: 4707/7482 cut-off events. [2024-06-28 04:41:39,692 INFO L125 PetriNetUnfolderBase]: For 558165/558165 co-relation queries the response was YES. [2024-06-28 04:41:39,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49895 conditions, 7482 events. 4707/7482 cut-off events. For 558165/558165 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 47530 event pairs, 873 based on Foata normal form. 4/7478 useless extension candidates. Maximal degree in co-relation 49718. Up to 5226 conditions per place. [2024-06-28 04:41:39,799 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 299 selfloop transitions, 316 changer transitions 0/620 dead transitions. [2024-06-28 04:41:39,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 620 transitions, 10450 flow [2024-06-28 04:41:39,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:41:39,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:41:39,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-28 04:41:39,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-28 04:41:39,801 INFO L175 Difference]: Start difference. First operand has 431 places, 584 transitions, 8590 flow. Second operand 10 states and 173 transitions. [2024-06-28 04:41:39,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 620 transitions, 10450 flow [2024-06-28 04:41:43,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 620 transitions, 10352 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-28 04:41:43,383 INFO L231 Difference]: Finished difference. Result has 434 places, 590 transitions, 9250 flow [2024-06-28 04:41:43,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8492, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=310, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9250, PETRI_PLACES=434, PETRI_TRANSITIONS=590} [2024-06-28 04:41:43,383 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-28 04:41:43,383 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 590 transitions, 9250 flow [2024-06-28 04:41:43,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:41:43,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:41:43,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:41:43,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-28 04:41:43,384 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:41:43,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:41:43,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1764764230, now seen corresponding path program 21 times [2024-06-28 04:41:43,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:41:43,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611201763] [2024-06-28 04:41:43,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:41:43,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:41:43,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:41:47,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:41:47,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:41:47,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611201763] [2024-06-28 04:41:47,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611201763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:41:47,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:41:47,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:41:47,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925916250] [2024-06-28 04:41:47,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:41:47,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:41:47,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:41:47,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:41:47,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:41:47,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:41:47,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 590 transitions, 9250 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:41:47,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:41:47,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:41:47,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:41:49,865 INFO L124 PetriNetUnfolderBase]: 4695/7462 cut-off events. [2024-06-28 04:41:49,865 INFO L125 PetriNetUnfolderBase]: For 550619/550619 co-relation queries the response was YES. [2024-06-28 04:41:49,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50649 conditions, 7462 events. 4695/7462 cut-off events. For 550619/550619 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 47434 event pairs, 871 based on Foata normal form. 4/7458 useless extension candidates. Maximal degree in co-relation 50471. Up to 5218 conditions per place. [2024-06-28 04:41:49,972 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 300 selfloop transitions, 314 changer transitions 0/619 dead transitions. [2024-06-28 04:41:49,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 619 transitions, 10774 flow [2024-06-28 04:41:49,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:41:49,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:41:49,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-28 04:41:49,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-28 04:41:49,973 INFO L175 Difference]: Start difference. First operand has 434 places, 590 transitions, 9250 flow. Second operand 9 states and 160 transitions. [2024-06-28 04:41:49,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 619 transitions, 10774 flow [2024-06-28 04:41:53,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 619 transitions, 10217 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-28 04:41:53,020 INFO L231 Difference]: Finished difference. Result has 437 places, 590 transitions, 9327 flow [2024-06-28 04:41:53,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8693, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=314, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9327, PETRI_PLACES=437, PETRI_TRANSITIONS=590} [2024-06-28 04:41:53,020 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-28 04:41:53,021 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 590 transitions, 9327 flow [2024-06-28 04:41:53,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:41:53,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:41:53,021 INFO 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 04:41:53,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-28 04:41:53,021 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:41:53,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:41:53,021 INFO L85 PathProgramCache]: Analyzing trace with hash -799743614, now seen corresponding path program 22 times [2024-06-28 04:41:53,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:41:53,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947125427] [2024-06-28 04:41:53,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:41:53,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:41:53,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:41:56,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:41:56,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:41:56,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947125427] [2024-06-28 04:41:56,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947125427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:41:56,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:41:56,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:41:56,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748100648] [2024-06-28 04:41:56,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:41:56,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:41:56,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:41:56,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:41:56,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:41:56,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:41:56,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 590 transitions, 9327 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:41:56,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:41:56,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:41:56,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:41:58,477 INFO L124 PetriNetUnfolderBase]: 4715/7523 cut-off events. [2024-06-28 04:41:58,477 INFO L125 PetriNetUnfolderBase]: For 567613/567613 co-relation queries the response was YES. [2024-06-28 04:41:58,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50870 conditions, 7523 events. 4715/7523 cut-off events. For 567613/567613 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 48250 event pairs, 1753 based on Foata normal form. 4/7526 useless extension candidates. Maximal degree in co-relation 50691. Up to 7029 conditions per place. [2024-06-28 04:41:58,581 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 584 selfloop transitions, 26 changer transitions 0/615 dead transitions. [2024-06-28 04:41:58,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 615 transitions, 10672 flow [2024-06-28 04:41:58,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:41:58,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:41:58,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-28 04:41:58,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-28 04:41:58,583 INFO L175 Difference]: Start difference. First operand has 437 places, 590 transitions, 9327 flow. Second operand 9 states and 142 transitions. [2024-06-28 04:41:58,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 615 transitions, 10672 flow [2024-06-28 04:42:01,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 615 transitions, 10034 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-28 04:42:01,277 INFO L231 Difference]: Finished difference. Result has 438 places, 593 transitions, 8822 flow [2024-06-28 04:42:01,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8695, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8822, PETRI_PLACES=438, PETRI_TRANSITIONS=593} [2024-06-28 04:42:01,277 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-28 04:42:01,277 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 593 transitions, 8822 flow [2024-06-28 04:42:01,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:42:01,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:42:01,278 INFO 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 04:42:01,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-28 04:42:01,278 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:42:01,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:42:01,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1060174484, now seen corresponding path program 23 times [2024-06-28 04:42:01,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:42:01,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407051540] [2024-06-28 04:42:01,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:42:01,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:42:01,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:42:04,441 INFO 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 04:42:04,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:42:04,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407051540] [2024-06-28 04:42:04,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407051540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:42:04,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:42:04,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:42:04,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891839360] [2024-06-28 04:42:04,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:42:04,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:42:04,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:42:04,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:42:04,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:42:04,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:42:04,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 593 transitions, 8822 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:42:04,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:42:04,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:42:04,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:42:06,783 INFO L124 PetriNetUnfolderBase]: 4799/7628 cut-off events. [2024-06-28 04:42:06,784 INFO L125 PetriNetUnfolderBase]: For 616874/616874 co-relation queries the response was YES. [2024-06-28 04:42:06,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51304 conditions, 7628 events. 4799/7628 cut-off events. For 616874/616874 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 48608 event pairs, 1158 based on Foata normal form. 4/7624 useless extension candidates. Maximal degree in co-relation 51124. Up to 6380 conditions per place. [2024-06-28 04:42:07,111 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 450 selfloop transitions, 178 changer transitions 0/633 dead transitions. [2024-06-28 04:42:07,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 633 transitions, 10787 flow [2024-06-28 04:42:07,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 04:42:07,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 04:42:07,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 208 transitions. [2024-06-28 04:42:07,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 04:42:07,112 INFO L175 Difference]: Start difference. First operand has 438 places, 593 transitions, 8822 flow. Second operand 13 states and 208 transitions. [2024-06-28 04:42:07,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 633 transitions, 10787 flow [2024-06-28 04:42:09,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 633 transitions, 10697 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-28 04:42:09,904 INFO L231 Difference]: Finished difference. Result has 444 places, 602 transitions, 9289 flow [2024-06-28 04:42:09,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8732, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9289, PETRI_PLACES=444, PETRI_TRANSITIONS=602} [2024-06-28 04:42:09,904 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-28 04:42:09,904 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 602 transitions, 9289 flow [2024-06-28 04:42:09,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:42:09,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:42:09,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:42:09,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-28 04:42:09,905 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:42:09,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:42:09,906 INFO L85 PathProgramCache]: Analyzing trace with hash -191474408, now seen corresponding path program 24 times [2024-06-28 04:42:09,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:42:09,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113215683] [2024-06-28 04:42:09,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:42:09,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:42:09,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:42:12,994 INFO 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 04:42:12,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:42:12,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113215683] [2024-06-28 04:42:12,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113215683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:42:12,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:42:12,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:42:12,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635668742] [2024-06-28 04:42:12,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:42:12,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:42:12,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:42:13,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:42:13,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:42:13,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:42:13,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 602 transitions, 9289 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:42:13,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:42:13,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:42:13,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:42:15,251 INFO L124 PetriNetUnfolderBase]: 4819/7660 cut-off events. [2024-06-28 04:42:15,251 INFO L125 PetriNetUnfolderBase]: For 631644/631644 co-relation queries the response was YES. [2024-06-28 04:42:15,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52134 conditions, 7660 events. 4819/7660 cut-off events. For 631644/631644 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 48855 event pairs, 1156 based on Foata normal form. 4/7656 useless extension candidates. Maximal degree in co-relation 51953. Up to 6396 conditions per place. [2024-06-28 04:42:15,368 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 456 selfloop transitions, 174 changer transitions 0/635 dead transitions. [2024-06-28 04:42:15,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 635 transitions, 11356 flow [2024-06-28 04:42:15,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:42:15,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:42:15,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-28 04:42:15,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-28 04:42:15,369 INFO L175 Difference]: Start difference. First operand has 444 places, 602 transitions, 9289 flow. Second operand 11 states and 185 transitions. [2024-06-28 04:42:15,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 635 transitions, 11356 flow [2024-06-28 04:42:18,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 635 transitions, 10713 flow, removed 46 selfloop flow, removed 11 redundant places. [2024-06-28 04:42:18,851 INFO L231 Difference]: Finished difference. Result has 444 places, 605 transitions, 9069 flow [2024-06-28 04:42:18,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8666, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9069, PETRI_PLACES=444, PETRI_TRANSITIONS=605} [2024-06-28 04:42:18,852 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-28 04:42:18,852 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 605 transitions, 9069 flow [2024-06-28 04:42:18,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:42:18,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:42:18,852 INFO 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 04:42:18,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-28 04:42:18,852 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:42:18,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:42:18,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1746082906, now seen corresponding path program 25 times [2024-06-28 04:42:18,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:42:18,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252657554] [2024-06-28 04:42:18,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:42:18,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:42:18,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:42:22,965 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 04:42:22,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:42:22,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252657554] [2024-06-28 04:42:22,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252657554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:42:22,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:42:22,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:42:22,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809402943] [2024-06-28 04:42:22,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:42:22,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:42:22,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:42:22,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:42:22,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:42:22,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:42:22,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 605 transitions, 9069 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:42:22,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:42:22,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:42:22,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:42:25,672 INFO L124 PetriNetUnfolderBase]: 4807/7667 cut-off events. [2024-06-28 04:42:25,672 INFO L125 PetriNetUnfolderBase]: For 614545/614545 co-relation queries the response was YES. [2024-06-28 04:42:25,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50972 conditions, 7667 events. 4807/7667 cut-off events. For 614545/614545 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 49360 event pairs, 1773 based on Foata normal form. 4/7670 useless extension candidates. Maximal degree in co-relation 50791. Up to 7033 conditions per place. [2024-06-28 04:42:25,786 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 587 selfloop transitions, 45 changer transitions 0/637 dead transitions. [2024-06-28 04:42:25,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 637 transitions, 10633 flow [2024-06-28 04:42:25,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 04:42:25,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 04:42:25,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 197 transitions. [2024-06-28 04:42:25,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3608058608058608 [2024-06-28 04:42:25,787 INFO L175 Difference]: Start difference. First operand has 444 places, 605 transitions, 9069 flow. Second operand 13 states and 197 transitions. [2024-06-28 04:42:25,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 637 transitions, 10633 flow [2024-06-28 04:42:29,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 637 transitions, 10150 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-28 04:42:29,411 INFO L231 Difference]: Finished difference. Result has 449 places, 605 transitions, 8682 flow [2024-06-28 04:42:29,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8586, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8682, PETRI_PLACES=449, PETRI_TRANSITIONS=605} [2024-06-28 04:42:29,416 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 406 predicate places. [2024-06-28 04:42:29,416 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 605 transitions, 8682 flow [2024-06-28 04:42:29,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:42:29,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:42:29,417 INFO 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 04:42:29,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-28 04:42:29,417 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:42:29,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:42:29,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1564791248, now seen corresponding path program 26 times [2024-06-28 04:42:29,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:42:29,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256630626] [2024-06-28 04:42:29,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:42:29,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:42:29,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:42:32,282 INFO 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 04:42:32,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:42:32,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256630626] [2024-06-28 04:42:32,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256630626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:42:32,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:42:32,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:42:32,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100604318] [2024-06-28 04:42:32,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:42:32,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:42:32,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:42:32,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:42:32,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:42:32,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:42:32,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 605 transitions, 8682 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:42:32,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:42:32,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:42:32,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:42:34,687 INFO L124 PetriNetUnfolderBase]: 4795/7630 cut-off events. [2024-06-28 04:42:34,687 INFO L125 PetriNetUnfolderBase]: For 587860/587860 co-relation queries the response was YES. [2024-06-28 04:42:34,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49840 conditions, 7630 events. 4795/7630 cut-off events. For 587860/587860 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 48678 event pairs, 1150 based on Foata normal form. 4/7626 useless extension candidates. Maximal degree in co-relation 49658. Up to 6380 conditions per place. [2024-06-28 04:42:34,792 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 455 selfloop transitions, 175 changer transitions 0/635 dead transitions. [2024-06-28 04:42:34,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 635 transitions, 10692 flow [2024-06-28 04:42:34,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:42:34,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:42:34,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-28 04:42:34,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-28 04:42:34,794 INFO L175 Difference]: Start difference. First operand has 449 places, 605 transitions, 8682 flow. Second operand 11 states and 185 transitions. [2024-06-28 04:42:34,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 635 transitions, 10692 flow [2024-06-28 04:42:37,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 635 transitions, 10472 flow, removed 38 selfloop flow, removed 12 redundant places. [2024-06-28 04:42:37,675 INFO L231 Difference]: Finished difference. Result has 448 places, 605 transitions, 8818 flow [2024-06-28 04:42:37,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8462, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8818, PETRI_PLACES=448, PETRI_TRANSITIONS=605} [2024-06-28 04:42:37,680 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 405 predicate places. [2024-06-28 04:42:37,680 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 605 transitions, 8818 flow [2024-06-28 04:42:37,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:42:37,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:42:37,681 INFO 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 04:42:37,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-28 04:42:37,704 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:42:37,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:42:37,704 INFO L85 PathProgramCache]: Analyzing trace with hash 2045534230, now seen corresponding path program 27 times [2024-06-28 04:42:37,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:42:37,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704238422] [2024-06-28 04:42:37,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:42:37,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:42:37,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:42:40,739 INFO 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 04:42:40,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:42:40,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704238422] [2024-06-28 04:42:40,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704238422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:42:40,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:42:40,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:42:40,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771209010] [2024-06-28 04:42:40,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:42:40,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:42:40,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:42:40,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:42:40,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:42:40,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:42:40,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 605 transitions, 8818 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:42:40,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:42:40,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:42:40,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:42:43,242 INFO L124 PetriNetUnfolderBase]: 4783/7639 cut-off events. [2024-06-28 04:42:43,242 INFO L125 PetriNetUnfolderBase]: For 575335/575335 co-relation queries the response was YES. [2024-06-28 04:42:43,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49684 conditions, 7639 events. 4783/7639 cut-off events. For 575335/575335 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 49296 event pairs, 1765 based on Foata normal form. 4/7642 useless extension candidates. Maximal degree in co-relation 49501. Up to 7009 conditions per place. [2024-06-28 04:42:43,350 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 580 selfloop transitions, 46 changer transitions 0/631 dead transitions. [2024-06-28 04:42:43,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 631 transitions, 10362 flow [2024-06-28 04:42:43,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:42:43,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:42:43,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 178 transitions. [2024-06-28 04:42:43,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3531746031746032 [2024-06-28 04:42:43,352 INFO L175 Difference]: Start difference. First operand has 448 places, 605 transitions, 8818 flow. Second operand 12 states and 178 transitions. [2024-06-28 04:42:43,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 631 transitions, 10362 flow [2024-06-28 04:42:47,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 631 transitions, 9904 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-28 04:42:47,409 INFO L231 Difference]: Finished difference. Result has 450 places, 605 transitions, 8458 flow [2024-06-28 04:42:47,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8360, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8458, PETRI_PLACES=450, PETRI_TRANSITIONS=605} [2024-06-28 04:42:47,409 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-28 04:42:47,410 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 605 transitions, 8458 flow [2024-06-28 04:42:47,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:42:47,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:42:47,410 INFO 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 04:42:47,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-28 04:42:47,410 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:42:47,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:42:47,411 INFO L85 PathProgramCache]: Analyzing trace with hash 488305712, now seen corresponding path program 28 times [2024-06-28 04:42:47,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:42:47,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060790840] [2024-06-28 04:42:47,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:42:47,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:42:47,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:42:50,372 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 04:42:50,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:42:50,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060790840] [2024-06-28 04:42:50,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060790840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:42:50,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:42:50,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:42:50,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105388659] [2024-06-28 04:42:50,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:42:50,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:42:50,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:42:50,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:42:50,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:42:50,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:42:50,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 605 transitions, 8458 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:42:50,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:42:50,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:42:50,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:42:52,573 INFO L124 PetriNetUnfolderBase]: 4803/7642 cut-off events. [2024-06-28 04:42:52,573 INFO L125 PetriNetUnfolderBase]: For 576989/576989 co-relation queries the response was YES. [2024-06-28 04:42:52,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49209 conditions, 7642 events. 4803/7642 cut-off events. For 576989/576989 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 48771 event pairs, 1174 based on Foata normal form. 4/7638 useless extension candidates. Maximal degree in co-relation 49025. Up to 6388 conditions per place. [2024-06-28 04:42:52,681 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 453 selfloop transitions, 174 changer transitions 0/632 dead transitions. [2024-06-28 04:42:52,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 632 transitions, 10293 flow [2024-06-28 04:42:52,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:42:52,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:42:52,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-28 04:42:52,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 04:42:52,682 INFO L175 Difference]: Start difference. First operand has 450 places, 605 transitions, 8458 flow. Second operand 9 states and 153 transitions. [2024-06-28 04:42:52,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 632 transitions, 10293 flow [2024-06-28 04:42:56,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 632 transitions, 10135 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-06-28 04:42:56,302 INFO L231 Difference]: Finished difference. Result has 446 places, 608 transitions, 8715 flow [2024-06-28 04:42:56,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8300, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8715, PETRI_PLACES=446, PETRI_TRANSITIONS=608} [2024-06-28 04:42:56,302 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-28 04:42:56,302 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 608 transitions, 8715 flow [2024-06-28 04:42:56,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:42:56,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:42:56,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:42:56,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-28 04:42:56,303 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:42:56,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:42:56,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1665572116, now seen corresponding path program 29 times [2024-06-28 04:42:56,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:42:56,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950551823] [2024-06-28 04:42:56,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:42:56,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:42:56,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15