./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe003_power.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe003_power.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe003_power.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe003_power.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 12:55:46,035 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:55:46,099 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:55:46,105 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:55:46,105 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:55:46,127 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:55:46,127 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:55:46,127 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:55:46,128 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:55:46,128 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:55:46,129 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:55:46,129 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:55:46,129 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:55:46,130 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:55:46,130 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:55:46,130 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:55:46,131 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:55:46,131 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:55:46,131 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:55:46,131 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:55:46,132 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:55:46,132 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:55:46,132 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:55:46,133 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:55:46,133 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:55:46,133 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:55:46,134 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:55:46,134 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:55:46,134 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:55:46,134 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:55:46,135 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:55:46,135 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:55:46,135 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:55:46,136 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:55:46,136 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:55:46,136 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:55:46,136 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:55:46,136 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:55:46,137 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:55:46,137 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:55:46,137 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:55:46,144 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:55:46,144 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:55:46,145 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:55:46,315 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:55:46,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:55:46,334 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:55:46,335 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:55:46,336 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:55:46,337 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe003_power.opt.yml/witness.yml [2024-06-14 12:55:46,539 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:55:46,540 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:55:46,540 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe003_power.opt.i [2024-06-14 12:55:47,536 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:55:47,746 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:55:47,750 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe003_power.opt.i [2024-06-14 12:55:47,763 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/922802f53/a0deb91d5cda4af8ac0363687c0500cb/FLAGde3161522 [2024-06-14 12:55:47,773 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/922802f53/a0deb91d5cda4af8ac0363687c0500cb [2024-06-14 12:55:47,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:55:47,775 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:55:47,775 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:55:47,779 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:55:47,783 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:55:47,783 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:55:46" (1/2) ... [2024-06-14 12:55:47,789 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17b29ba7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:55:47, skipping insertion in model container [2024-06-14 12:55:47,789 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:55:46" (1/2) ... [2024-06-14 12:55:47,790 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@50cf1de7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:55:47, skipping insertion in model container [2024-06-14 12:55:47,790 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:55:47" (2/2) ... [2024-06-14 12:55:47,790 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17b29ba7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:55:47, skipping insertion in model container [2024-06-14 12:55:47,790 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:55:47" (2/2) ... [2024-06-14 12:55:47,791 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:55:47,902 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:55:47,903 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p1_EAX$read_delayed_var && *__unbuffered_p1_EAX$read_delayed_var <= 1) && __unbuffered_p1_EAX$read_delayed_var == & x) && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0) [2024-06-14 12:55:47,904 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p1_EAX$read_delayed_var && *__unbuffered_p1_EAX$read_delayed_var <= 1) && __unbuffered_p1_EAX$read_delayed_var == & x) && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0) [2024-06-14 12:55:47,904 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p1_EAX$read_delayed_var && *__unbuffered_p1_EAX$read_delayed_var <= 1) && __unbuffered_p1_EAX$read_delayed_var == & x) && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0) [2024-06-14 12:55:47,904 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:55:47,904 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-14 12:55:47,939 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:55:48,303 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:55:48,313 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:55:48,460 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:55:48,490 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:55:48,490 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:55:48 WrapperNode [2024-06-14 12:55:48,490 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:55:48,491 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:55:48,491 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:55:48,491 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:55:48,496 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:55:48" (1/1) ... [2024-06-14 12:55:48,508 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:55:48" (1/1) ... [2024-06-14 12:55:48,546 INFO L138 Inliner]: procedures = 175, calls = 86, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 254 [2024-06-14 12:55:48,546 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:55:48,547 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:55:48,547 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:55:48,547 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:55:48,556 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:55:48" (1/1) ... [2024-06-14 12:55:48,556 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:55:48" (1/1) ... [2024-06-14 12:55:48,561 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:55:48" (1/1) ... [2024-06-14 12:55:48,576 INFO L175 MemorySlicer]: Split 44 memory accesses to 2 slices as follows [2, 42]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 6 writes are split as follows [0, 6]. [2024-06-14 12:55:48,592 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:55:48" (1/1) ... [2024-06-14 12:55:48,592 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:55:48" (1/1) ... [2024-06-14 12:55:48,602 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:55:48" (1/1) ... [2024-06-14 12:55:48,617 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:55:48" (1/1) ... [2024-06-14 12:55:48,619 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:55:48" (1/1) ... [2024-06-14 12:55:48,621 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:55:48" (1/1) ... [2024-06-14 12:55:48,625 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:55:48,625 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:55:48,625 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:55:48,626 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:55:48,626 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:55:48" (1/1) ... [2024-06-14 12:55:48,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:55:48,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:55:48,698 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 12:55:48,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 12:55:48,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-14 12:55:48,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-14 12:55:48,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-14 12:55:48,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-14 12:55:48,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:55:48,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:55:48,786 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:55:48,787 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:55:48,787 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:55:48,787 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:55:48,787 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:55:48,787 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:55:48,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:55:48,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-14 12:55:48,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:55:48,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:55:48,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:55:48,790 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:55:48,905 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:55:48,906 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:55:49,403 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:55:49,404 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:55:49,767 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:55:49,768 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:55:49,768 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:55:49 BoogieIcfgContainer [2024-06-14 12:55:49,768 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:55:49,771 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:55:49,771 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:55:49,773 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:55:49,773 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:55:46" (1/4) ... [2024-06-14 12:55:49,774 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2550aa52 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:55:49, skipping insertion in model container [2024-06-14 12:55:49,774 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:55:47" (2/4) ... [2024-06-14 12:55:49,774 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2550aa52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:55:49, skipping insertion in model container [2024-06-14 12:55:49,774 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:55:48" (3/4) ... [2024-06-14 12:55:49,774 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2550aa52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:55:49, skipping insertion in model container [2024-06-14 12:55:49,775 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:55:49" (4/4) ... [2024-06-14 12:55:49,775 INFO L112 eAbstractionObserver]: Analyzing ICFG safe003_power.opt.i [2024-06-14 12:55:49,790 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:55:49,791 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 12:55:49,791 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:55:49,851 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:55:49,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 12:55:49,918 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-14 12:55:49,918 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:55:49,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 56 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:55:49,920 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 12:55:49,922 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-14 12:55:49,933 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:55:49,938 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;@2b28eebf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:55:49,939 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 12:55:49,943 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:55:49,943 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:55:49,944 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:55:49,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:49,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:55:49,945 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)] === [2024-06-14 12:55:49,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:49,950 INFO L85 PathProgramCache]: Analyzing trace with hash 521693137, now seen corresponding path program 1 times [2024-06-14 12:55:49,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:49,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280314994] [2024-06-14 12:55:49,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:49,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:51,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:55:51,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:51,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280314994] [2024-06-14 12:55:51,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280314994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:51,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:51,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:55:51,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897713036] [2024-06-14 12:55:51,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:51,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:55:51,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:51,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:55:51,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:55:51,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:55:51,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:51,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:51,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:55:51,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:55:52,176 INFO L124 PetriNetUnfolderBase]: 1217/1863 cut-off events. [2024-06-14 12:55:52,177 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-06-14 12:55:52,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3812 conditions, 1863 events. 1217/1863 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8684 event pairs, 814 based on Foata normal form. 2/1818 useless extension candidates. Maximal degree in co-relation 3797. Up to 1843 conditions per place. [2024-06-14 12:55:52,189 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 38 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2024-06-14 12:55:52,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 47 transitions, 193 flow [2024-06-14 12:55:52,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:55:52,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:55:52,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-06-14 12:55:52,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348837209302325 [2024-06-14 12:55:52,200 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 69 transitions. [2024-06-14 12:55:52,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 47 transitions, 193 flow [2024-06-14 12:55:52,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 47 transitions, 188 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 12:55:52,204 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-14 12:55:52,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-14 12:55:52,208 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-14 12:55:52,208 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-14 12:55:52,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:52,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:52,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:55:52,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:55:52,209 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)] === [2024-06-14 12:55:52,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:52,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1164033584, now seen corresponding path program 1 times [2024-06-14 12:55:52,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:52,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923988977] [2024-06-14 12:55:52,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:52,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:52,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:53,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:55:53,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:53,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923988977] [2024-06-14 12:55:53,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923988977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:53,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:53,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:55:53,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537022715] [2024-06-14 12:55:53,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:53,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:55:53,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:53,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:55:53,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:55:53,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:55:53,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:53,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:53,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:55:53,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:55:54,123 INFO L124 PetriNetUnfolderBase]: 1709/2564 cut-off events. [2024-06-14 12:55:54,136 INFO L125 PetriNetUnfolderBase]: For 386/386 co-relation queries the response was YES. [2024-06-14 12:55:54,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5870 conditions, 2564 events. 1709/2564 cut-off events. For 386/386 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11619 event pairs, 1050 based on Foata normal form. 3/2565 useless extension candidates. Maximal degree in co-relation 5855. Up to 2530 conditions per place. [2024-06-14 12:55:54,147 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 51 selfloop transitions, 7 changer transitions 0/61 dead transitions. [2024-06-14 12:55:54,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 61 transitions, 284 flow [2024-06-14 12:55:54,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:55:54,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:55:54,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 82 transitions. [2024-06-14 12:55:54,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-14 12:55:54,166 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 82 transitions. [2024-06-14 12:55:54,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 61 transitions, 284 flow [2024-06-14 12:55:54,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 61 transitions, 278 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:55:54,168 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 156 flow [2024-06-14 12:55:54,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2024-06-14 12:55:54,168 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2024-06-14 12:55:54,169 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 156 flow [2024-06-14 12:55:54,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:54,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:54,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:55:54,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:55:54,169 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)] === [2024-06-14 12:55:54,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:54,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1725301569, now seen corresponding path program 1 times [2024-06-14 12:55:54,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:54,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195941890] [2024-06-14 12:55:54,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:54,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:54,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:55,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:55:55,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:55,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195941890] [2024-06-14 12:55:55,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195941890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:55,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:55,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:55:55,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611651951] [2024-06-14 12:55:55,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:55,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:55:55,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:55,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:55:55,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:55:55,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:55:55,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:55,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:55,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:55:55,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:55:56,139 INFO L124 PetriNetUnfolderBase]: 1703/2555 cut-off events. [2024-06-14 12:55:56,139 INFO L125 PetriNetUnfolderBase]: For 1251/1251 co-relation queries the response was YES. [2024-06-14 12:55:56,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6492 conditions, 2555 events. 1703/2555 cut-off events. For 1251/1251 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11568 event pairs, 899 based on Foata normal form. 3/2556 useless extension candidates. Maximal degree in co-relation 6474. Up to 2502 conditions per place. [2024-06-14 12:55:56,152 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 60 selfloop transitions, 10 changer transitions 0/73 dead transitions. [2024-06-14 12:55:56,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 73 transitions, 374 flow [2024-06-14 12:55:56,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:55:56,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:55:56,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-06-14 12:55:56,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-14 12:55:56,154 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 156 flow. Second operand 5 states and 100 transitions. [2024-06-14 12:55:56,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 73 transitions, 374 flow [2024-06-14 12:55:56,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 73 transitions, 372 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-14 12:55:56,157 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 202 flow [2024-06-14 12:55:56,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2024-06-14 12:55:56,158 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-14 12:55:56,158 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 202 flow [2024-06-14 12:55:56,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:56,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:56,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:55:56,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:55:56,159 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:55:56,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:56,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1944739889, now seen corresponding path program 1 times [2024-06-14 12:55:56,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:56,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527856418] [2024-06-14 12:55:56,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:56,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:57,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:55:57,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:57,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527856418] [2024-06-14 12:55:57,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527856418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:57,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:57,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:55:57,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706821066] [2024-06-14 12:55:57,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:57,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:55:57,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:57,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:55:57,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:55:57,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:55:57,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:57,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:57,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:55:57,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:55:58,613 INFO L124 PetriNetUnfolderBase]: 1697/2546 cut-off events. [2024-06-14 12:55:58,614 INFO L125 PetriNetUnfolderBase]: For 2277/2277 co-relation queries the response was YES. [2024-06-14 12:55:58,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7106 conditions, 2546 events. 1697/2546 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11529 event pairs, 748 based on Foata normal form. 3/2547 useless extension candidates. Maximal degree in co-relation 7085. Up to 2474 conditions per place. [2024-06-14 12:55:58,628 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 69 selfloop transitions, 13 changer transitions 0/85 dead transitions. [2024-06-14 12:55:58,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 85 transitions, 470 flow [2024-06-14 12:55:58,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:55:58,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:55:58,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-14 12:55:58,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-14 12:55:58,630 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 202 flow. Second operand 6 states and 118 transitions. [2024-06-14 12:55:58,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 85 transitions, 470 flow [2024-06-14 12:55:58,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 85 transitions, 448 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 12:55:58,633 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 238 flow [2024-06-14 12:55:58,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=238, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-14 12:55:58,634 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2024-06-14 12:55:58,634 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 238 flow [2024-06-14 12:55:58,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:58,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:58,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:55:58,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:55:58,635 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:55:58,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:58,636 INFO L85 PathProgramCache]: Analyzing trace with hash -157393186, now seen corresponding path program 1 times [2024-06-14 12:55:58,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:58,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436843013] [2024-06-14 12:55:58,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:58,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:00,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:00,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:00,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436843013] [2024-06-14 12:56:00,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436843013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:00,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:00,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:56:00,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126590702] [2024-06-14 12:56:00,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:00,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:56:00,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:00,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:56:00,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:56:00,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:56:00,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 238 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:00,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:00,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:56:00,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:01,183 INFO L124 PetriNetUnfolderBase]: 1688/2531 cut-off events. [2024-06-14 12:56:01,184 INFO L125 PetriNetUnfolderBase]: For 3540/3540 co-relation queries the response was YES. [2024-06-14 12:56:01,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7629 conditions, 2531 events. 1688/2531 cut-off events. For 3540/3540 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11407 event pairs, 579 based on Foata normal form. 6/2535 useless extension candidates. Maximal degree in co-relation 7607. Up to 2421 conditions per place. [2024-06-14 12:56:01,198 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 74 selfloop transitions, 15 changer transitions 0/92 dead transitions. [2024-06-14 12:56:01,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 92 transitions, 526 flow [2024-06-14 12:56:01,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:01,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:01,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 12:56:01,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-14 12:56:01,200 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 238 flow. Second operand 7 states and 131 transitions. [2024-06-14 12:56:01,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 92 transitions, 526 flow [2024-06-14 12:56:01,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 92 transitions, 494 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 12:56:01,206 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 255 flow [2024-06-14 12:56:01,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=255, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2024-06-14 12:56:01,207 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-14 12:56:01,207 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 255 flow [2024-06-14 12:56:01,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:01,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:01,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:01,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:56:01,208 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)] === [2024-06-14 12:56:01,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:01,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1236374681, now seen corresponding path program 1 times [2024-06-14 12:56:01,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:01,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91860438] [2024-06-14 12:56:01,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:01,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:01,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:02,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:02,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:02,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91860438] [2024-06-14 12:56:02,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91860438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:02,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:02,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:56:02,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210710540] [2024-06-14 12:56:02,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:02,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:56:02,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:02,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:56:02,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:56:02,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:56:02,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 255 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:02,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:02,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:56:02,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:03,782 INFO L124 PetriNetUnfolderBase]: 1340/2090 cut-off events. [2024-06-14 12:56:03,782 INFO L125 PetriNetUnfolderBase]: For 4185/4233 co-relation queries the response was YES. [2024-06-14 12:56:03,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6560 conditions, 2090 events. 1340/2090 cut-off events. For 4185/4233 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9987 event pairs, 506 based on Foata normal form. 4/2012 useless extension candidates. Maximal degree in co-relation 6537. Up to 1959 conditions per place. [2024-06-14 12:56:03,796 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 49 selfloop transitions, 10 changer transitions 0/69 dead transitions. [2024-06-14 12:56:03,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 69 transitions, 421 flow [2024-06-14 12:56:03,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:56:03,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:56:03,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-14 12:56:03,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42790697674418604 [2024-06-14 12:56:03,799 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 255 flow. Second operand 5 states and 92 transitions. [2024-06-14 12:56:03,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 69 transitions, 421 flow [2024-06-14 12:56:03,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 69 transitions, 380 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 12:56:03,803 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 259 flow [2024-06-14 12:56:03,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=259, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-14 12:56:03,806 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-14 12:56:03,806 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 259 flow [2024-06-14 12:56:03,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:03,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:03,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:03,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:56:03,807 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)] === [2024-06-14 12:56:03,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:03,807 INFO L85 PathProgramCache]: Analyzing trace with hash -347644240, now seen corresponding path program 1 times [2024-06-14 12:56:03,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:03,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031794206] [2024-06-14 12:56:03,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:03,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:05,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:05,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:05,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031794206] [2024-06-14 12:56:05,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031794206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:05,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:05,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:56:05,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821653939] [2024-06-14 12:56:05,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:05,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:56:05,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:05,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:56:05,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:56:05,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:56:05,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 259 flow. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:05,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:05,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:56:05,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:07,052 INFO L124 PetriNetUnfolderBase]: 1696/2548 cut-off events. [2024-06-14 12:56:07,052 INFO L125 PetriNetUnfolderBase]: For 6367/6377 co-relation queries the response was YES. [2024-06-14 12:56:07,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8564 conditions, 2548 events. 1696/2548 cut-off events. For 6367/6377 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11445 event pairs, 583 based on Foata normal form. 16/2561 useless extension candidates. Maximal degree in co-relation 8539. Up to 2400 conditions per place. [2024-06-14 12:56:07,071 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 67 selfloop transitions, 16 changer transitions 0/86 dead transitions. [2024-06-14 12:56:07,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 86 transitions, 557 flow [2024-06-14 12:56:07,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:56:07,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:56:07,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-14 12:56:07,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 12:56:07,073 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 259 flow. Second operand 6 states and 104 transitions. [2024-06-14 12:56:07,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 86 transitions, 557 flow [2024-06-14 12:56:07,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 86 transitions, 534 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 12:56:07,077 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 348 flow [2024-06-14 12:56:07,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=348, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2024-06-14 12:56:07,078 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 18 predicate places. [2024-06-14 12:56:07,079 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 348 flow [2024-06-14 12:56:07,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:07,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:07,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:07,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:56:07,079 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)] === [2024-06-14 12:56:07,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:07,080 INFO L85 PathProgramCache]: Analyzing trace with hash -683590392, now seen corresponding path program 1 times [2024-06-14 12:56:07,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:07,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77094575] [2024-06-14 12:56:07,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:07,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:08,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:08,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77094575] [2024-06-14 12:56:08,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77094575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:08,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:08,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:56:08,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054860304] [2024-06-14 12:56:08,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:08,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:56:08,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:08,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:56:08,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:56:08,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:56:08,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 348 flow. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:08,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:08,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:56:08,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:09,698 INFO L124 PetriNetUnfolderBase]: 1760/2649 cut-off events. [2024-06-14 12:56:09,699 INFO L125 PetriNetUnfolderBase]: For 8886/8892 co-relation queries the response was YES. [2024-06-14 12:56:09,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9942 conditions, 2649 events. 1760/2649 cut-off events. For 8886/8892 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11981 event pairs, 599 based on Foata normal form. 6/2648 useless extension candidates. Maximal degree in co-relation 9915. Up to 2447 conditions per place. [2024-06-14 12:56:09,714 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 79 selfloop transitions, 28 changer transitions 0/110 dead transitions. [2024-06-14 12:56:09,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 110 transitions, 792 flow [2024-06-14 12:56:09,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:09,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:09,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 12:56:09,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:56:09,716 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 348 flow. Second operand 7 states and 129 transitions. [2024-06-14 12:56:09,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 110 transitions, 792 flow [2024-06-14 12:56:09,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 110 transitions, 757 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-14 12:56:09,723 INFO L231 Difference]: Finished difference. Result has 70 places, 76 transitions, 523 flow [2024-06-14 12:56:09,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=523, PETRI_PLACES=70, PETRI_TRANSITIONS=76} [2024-06-14 12:56:09,724 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 26 predicate places. [2024-06-14 12:56:09,724 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 76 transitions, 523 flow [2024-06-14 12:56:09,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:09,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:09,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:09,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:56:09,725 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)] === [2024-06-14 12:56:09,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:09,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1550020550, now seen corresponding path program 2 times [2024-06-14 12:56:09,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:09,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454357890] [2024-06-14 12:56:09,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:09,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:09,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:11,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:11,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:11,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454357890] [2024-06-14 12:56:11,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454357890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:11,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:11,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:56:11,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700441252] [2024-06-14 12:56:11,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:11,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:56:11,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:11,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:56:11,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:56:11,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:56:11,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 76 transitions, 523 flow. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:11,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:11,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:56:11,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:12,379 INFO L124 PetriNetUnfolderBase]: 1782/2682 cut-off events. [2024-06-14 12:56:12,379 INFO L125 PetriNetUnfolderBase]: For 10816/10822 co-relation queries the response was YES. [2024-06-14 12:56:12,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10618 conditions, 2682 events. 1782/2682 cut-off events. For 10816/10822 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12118 event pairs, 623 based on Foata normal form. 7/2682 useless extension candidates. Maximal degree in co-relation 10586. Up to 2461 conditions per place. [2024-06-14 12:56:12,394 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 73 selfloop transitions, 33 changer transitions 0/109 dead transitions. [2024-06-14 12:56:12,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 109 transitions, 915 flow [2024-06-14 12:56:12,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:56:12,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:56:12,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-14 12:56:12,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42248062015503873 [2024-06-14 12:56:12,396 INFO L175 Difference]: Start difference. First operand has 70 places, 76 transitions, 523 flow. Second operand 6 states and 109 transitions. [2024-06-14 12:56:12,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 109 transitions, 915 flow [2024-06-14 12:56:12,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 109 transitions, 875 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-14 12:56:12,406 INFO L231 Difference]: Finished difference. Result has 74 places, 82 transitions, 636 flow [2024-06-14 12:56:12,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=636, PETRI_PLACES=74, PETRI_TRANSITIONS=82} [2024-06-14 12:56:12,406 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 30 predicate places. [2024-06-14 12:56:12,406 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 82 transitions, 636 flow [2024-06-14 12:56:12,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:12,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:12,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:12,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:56:12,407 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)] === [2024-06-14 12:56:12,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:12,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1846952344, now seen corresponding path program 3 times [2024-06-14 12:56:12,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:12,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581447146] [2024-06-14 12:56:12,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:12,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:12,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:14,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:14,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:14,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581447146] [2024-06-14 12:56:14,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581447146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:14,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:14,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:56:14,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785930052] [2024-06-14 12:56:14,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:14,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:56:14,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:14,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:56:14,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:56:14,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:56:14,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 82 transitions, 636 flow. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:14,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:14,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:56:14,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:15,172 INFO L124 PetriNetUnfolderBase]: 1752/2636 cut-off events. [2024-06-14 12:56:15,173 INFO L125 PetriNetUnfolderBase]: For 13079/13089 co-relation queries the response was YES. [2024-06-14 12:56:15,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10615 conditions, 2636 events. 1752/2636 cut-off events. For 13079/13089 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11902 event pairs, 605 based on Foata normal form. 17/2649 useless extension candidates. Maximal degree in co-relation 10581. Up to 2435 conditions per place. [2024-06-14 12:56:15,187 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 71 selfloop transitions, 30 changer transitions 0/104 dead transitions. [2024-06-14 12:56:15,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 104 transitions, 904 flow [2024-06-14 12:56:15,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:56:15,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:56:15,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-14 12:56:15,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:56:15,189 INFO L175 Difference]: Start difference. First operand has 74 places, 82 transitions, 636 flow. Second operand 6 states and 102 transitions. [2024-06-14 12:56:15,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 104 transitions, 904 flow [2024-06-14 12:56:15,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 104 transitions, 818 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 12:56:15,201 INFO L231 Difference]: Finished difference. Result has 76 places, 82 transitions, 624 flow [2024-06-14 12:56:15,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=624, PETRI_PLACES=76, PETRI_TRANSITIONS=82} [2024-06-14 12:56:15,203 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-14 12:56:15,203 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 82 transitions, 624 flow [2024-06-14 12:56:15,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:15,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:15,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:15,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:56:15,203 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)] === [2024-06-14 12:56:15,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:15,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1392365293, now seen corresponding path program 1 times [2024-06-14 12:56:15,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:15,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318482984] [2024-06-14 12:56:15,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:15,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:17,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:17,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:17,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318482984] [2024-06-14 12:56:17,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318482984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:17,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:17,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:56:17,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587674871] [2024-06-14 12:56:17,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:17,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:56:17,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:17,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:56:17,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:56:17,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:56:17,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 82 transitions, 624 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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) [2024-06-14 12:56:17,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:17,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:56:17,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:18,692 INFO L124 PetriNetUnfolderBase]: 1765/2653 cut-off events. [2024-06-14 12:56:18,693 INFO L125 PetriNetUnfolderBase]: For 12646/12646 co-relation queries the response was YES. [2024-06-14 12:56:18,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10640 conditions, 2653 events. 1765/2653 cut-off events. For 12646/12646 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11953 event pairs, 620 based on Foata normal form. 2/2653 useless extension candidates. Maximal degree in co-relation 10606. Up to 2568 conditions per place. [2024-06-14 12:56:18,705 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 97 selfloop transitions, 17 changer transitions 0/117 dead transitions. [2024-06-14 12:56:18,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 117 transitions, 966 flow [2024-06-14 12:56:18,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:18,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:18,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 12:56:18,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-14 12:56:18,708 INFO L175 Difference]: Start difference. First operand has 76 places, 82 transitions, 624 flow. Second operand 7 states and 118 transitions. [2024-06-14 12:56:18,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 117 transitions, 966 flow [2024-06-14 12:56:18,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 117 transitions, 916 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 12:56:18,717 INFO L231 Difference]: Finished difference. Result has 79 places, 85 transitions, 642 flow [2024-06-14 12:56:18,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=642, PETRI_PLACES=79, PETRI_TRANSITIONS=85} [2024-06-14 12:56:18,717 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 35 predicate places. [2024-06-14 12:56:18,717 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 85 transitions, 642 flow [2024-06-14 12:56:18,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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) [2024-06-14 12:56:18,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:18,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:18,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:56:18,718 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)] === [2024-06-14 12:56:18,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:18,718 INFO L85 PathProgramCache]: Analyzing trace with hash 757629093, now seen corresponding path program 2 times [2024-06-14 12:56:18,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:18,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448438660] [2024-06-14 12:56:18,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:18,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:20,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:20,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:20,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448438660] [2024-06-14 12:56:20,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448438660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:20,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:20,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:56:20,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066388048] [2024-06-14 12:56:20,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:20,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:56:20,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:20,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:56:20,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:56:20,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:56:20,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 85 transitions, 642 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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) [2024-06-14 12:56:20,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:20,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:56:20,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:21,609 INFO L124 PetriNetUnfolderBase]: 1778/2677 cut-off events. [2024-06-14 12:56:21,609 INFO L125 PetriNetUnfolderBase]: For 15182/15188 co-relation queries the response was YES. [2024-06-14 12:56:21,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11202 conditions, 2677 events. 1778/2677 cut-off events. For 15182/15188 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12124 event pairs, 605 based on Foata normal form. 6/2676 useless extension candidates. Maximal degree in co-relation 11167. Up to 2452 conditions per place. [2024-06-14 12:56:21,647 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 79 selfloop transitions, 36 changer transitions 0/118 dead transitions. [2024-06-14 12:56:21,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 118 transitions, 984 flow [2024-06-14 12:56:21,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:21,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:21,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 12:56:21,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-14 12:56:21,649 INFO L175 Difference]: Start difference. First operand has 79 places, 85 transitions, 642 flow. Second operand 7 states and 121 transitions. [2024-06-14 12:56:21,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 118 transitions, 984 flow [2024-06-14 12:56:21,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 118 transitions, 931 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 12:56:21,660 INFO L231 Difference]: Finished difference. Result has 80 places, 88 transitions, 703 flow [2024-06-14 12:56:21,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=703, PETRI_PLACES=80, PETRI_TRANSITIONS=88} [2024-06-14 12:56:21,662 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 36 predicate places. [2024-06-14 12:56:21,663 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 88 transitions, 703 flow [2024-06-14 12:56:21,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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) [2024-06-14 12:56:21,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:21,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:21,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:56:21,663 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)] === [2024-06-14 12:56:21,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:21,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1420949733, now seen corresponding path program 3 times [2024-06-14 12:56:21,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:21,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607679821] [2024-06-14 12:56:21,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:21,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:21,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:23,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:23,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607679821] [2024-06-14 12:56:23,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607679821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:23,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:23,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:56:23,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472960609] [2024-06-14 12:56:23,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:23,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:56:23,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:23,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:56:23,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:56:23,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:56:23,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 88 transitions, 703 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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) [2024-06-14 12:56:23,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:23,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:56:23,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:24,310 INFO L124 PetriNetUnfolderBase]: 1799/2705 cut-off events. [2024-06-14 12:56:24,310 INFO L125 PetriNetUnfolderBase]: For 18464/18474 co-relation queries the response was YES. [2024-06-14 12:56:24,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11950 conditions, 2705 events. 1799/2705 cut-off events. For 18464/18474 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12264 event pairs, 587 based on Foata normal form. 14/2715 useless extension candidates. Maximal degree in co-relation 11915. Up to 2453 conditions per place. [2024-06-14 12:56:24,324 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 83 selfloop transitions, 34 changer transitions 0/120 dead transitions. [2024-06-14 12:56:24,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 120 transitions, 1055 flow [2024-06-14 12:56:24,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:24,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:24,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 12:56:24,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-14 12:56:24,338 INFO L175 Difference]: Start difference. First operand has 80 places, 88 transitions, 703 flow. Second operand 7 states and 118 transitions. [2024-06-14 12:56:24,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 120 transitions, 1055 flow [2024-06-14 12:56:24,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 120 transitions, 969 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 12:56:24,350 INFO L231 Difference]: Finished difference. Result has 82 places, 92 transitions, 739 flow [2024-06-14 12:56:24,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=739, PETRI_PLACES=82, PETRI_TRANSITIONS=92} [2024-06-14 12:56:24,350 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 38 predicate places. [2024-06-14 12:56:24,351 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 92 transitions, 739 flow [2024-06-14 12:56:24,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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) [2024-06-14 12:56:24,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:24,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:24,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:56:24,351 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:24,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:24,352 INFO L85 PathProgramCache]: Analyzing trace with hash 921402767, now seen corresponding path program 1 times [2024-06-14 12:56:24,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:24,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763252654] [2024-06-14 12:56:24,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:24,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:27,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:27,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:27,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763252654] [2024-06-14 12:56:27,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763252654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:27,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:27,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:27,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373247258] [2024-06-14 12:56:27,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:27,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:27,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:27,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:27,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:27,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:56:27,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 92 transitions, 739 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 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) [2024-06-14 12:56:27,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:27,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:56:27,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:28,261 INFO L124 PetriNetUnfolderBase]: 1811/2725 cut-off events. [2024-06-14 12:56:28,261 INFO L125 PetriNetUnfolderBase]: For 21669/21679 co-relation queries the response was YES. [2024-06-14 12:56:28,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12627 conditions, 2725 events. 1811/2725 cut-off events. For 21669/21679 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12322 event pairs, 551 based on Foata normal form. 16/2737 useless extension candidates. Maximal degree in co-relation 12591. Up to 2480 conditions per place. [2024-06-14 12:56:28,276 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 84 selfloop transitions, 36 changer transitions 0/123 dead transitions. [2024-06-14 12:56:28,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 123 transitions, 1089 flow [2024-06-14 12:56:28,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:28,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:28,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 12:56:28,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-14 12:56:28,278 INFO L175 Difference]: Start difference. First operand has 82 places, 92 transitions, 739 flow. Second operand 7 states and 117 transitions. [2024-06-14 12:56:28,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 123 transitions, 1089 flow [2024-06-14 12:56:28,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 123 transitions, 999 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 12:56:28,294 INFO L231 Difference]: Finished difference. Result has 84 places, 95 transitions, 765 flow [2024-06-14 12:56:28,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=765, PETRI_PLACES=84, PETRI_TRANSITIONS=95} [2024-06-14 12:56:28,294 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-06-14 12:56:28,294 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 95 transitions, 765 flow [2024-06-14 12:56:28,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 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) [2024-06-14 12:56:28,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:28,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:28,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:56:28,295 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)] === [2024-06-14 12:56:28,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:28,295 INFO L85 PathProgramCache]: Analyzing trace with hash -213739385, now seen corresponding path program 1 times [2024-06-14 12:56:28,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:28,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324896990] [2024-06-14 12:56:28,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:28,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:30,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:30,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:30,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324896990] [2024-06-14 12:56:30,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324896990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:30,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:30,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:30,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741610898] [2024-06-14 12:56:30,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:30,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:30,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:30,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:30,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:30,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:56:30,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 95 transitions, 765 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 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) [2024-06-14 12:56:30,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:30,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:56:30,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:31,627 INFO L124 PetriNetUnfolderBase]: 1878/2826 cut-off events. [2024-06-14 12:56:31,628 INFO L125 PetriNetUnfolderBase]: For 25464/25476 co-relation queries the response was YES. [2024-06-14 12:56:31,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13531 conditions, 2826 events. 1878/2826 cut-off events. For 25464/25476 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12856 event pairs, 585 based on Foata normal form. 10/2829 useless extension candidates. Maximal degree in co-relation 13494. Up to 2439 conditions per place. [2024-06-14 12:56:31,643 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 94 selfloop transitions, 51 changer transitions 0/148 dead transitions. [2024-06-14 12:56:31,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 148 transitions, 1307 flow [2024-06-14 12:56:31,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:31,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:31,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:56:31,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 12:56:31,645 INFO L175 Difference]: Start difference. First operand has 84 places, 95 transitions, 765 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:56:31,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 148 transitions, 1307 flow [2024-06-14 12:56:31,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 148 transitions, 1215 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 12:56:31,662 INFO L231 Difference]: Finished difference. Result has 88 places, 102 transitions, 875 flow [2024-06-14 12:56:31,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=673, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=875, PETRI_PLACES=88, PETRI_TRANSITIONS=102} [2024-06-14 12:56:31,663 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-14 12:56:31,663 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 102 transitions, 875 flow [2024-06-14 12:56:31,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 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) [2024-06-14 12:56:31,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:31,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:31,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:56:31,664 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)] === [2024-06-14 12:56:31,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:31,664 INFO L85 PathProgramCache]: Analyzing trace with hash 2007948436, now seen corresponding path program 1 times [2024-06-14 12:56:31,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:31,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643008135] [2024-06-14 12:56:31,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:31,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:31,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:34,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:34,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:34,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643008135] [2024-06-14 12:56:34,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643008135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:34,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:34,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:56:34,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166812632] [2024-06-14 12:56:34,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:34,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:56:34,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:34,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:56:34,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:56:34,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:56:34,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 102 transitions, 875 flow. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:34,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:34,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:56:34,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:35,273 INFO L124 PetriNetUnfolderBase]: 1935/2911 cut-off events. [2024-06-14 12:56:35,273 INFO L125 PetriNetUnfolderBase]: For 30719/30736 co-relation queries the response was YES. [2024-06-14 12:56:35,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14682 conditions, 2911 events. 1935/2911 cut-off events. For 30719/30736 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 13346 event pairs, 560 based on Foata normal form. 17/2914 useless extension candidates. Maximal degree in co-relation 14643. Up to 2588 conditions per place. [2024-06-14 12:56:35,290 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 111 selfloop transitions, 38 changer transitions 0/152 dead transitions. [2024-06-14 12:56:35,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 152 transitions, 1503 flow [2024-06-14 12:56:35,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:35,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:35,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 12:56:35,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-14 12:56:35,292 INFO L175 Difference]: Start difference. First operand has 88 places, 102 transitions, 875 flow. Second operand 7 states and 123 transitions. [2024-06-14 12:56:35,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 152 transitions, 1503 flow [2024-06-14 12:56:35,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 152 transitions, 1399 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 12:56:35,313 INFO L231 Difference]: Finished difference. Result has 93 places, 118 transitions, 1087 flow [2024-06-14 12:56:35,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1087, PETRI_PLACES=93, PETRI_TRANSITIONS=118} [2024-06-14 12:56:35,314 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-14 12:56:35,314 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 118 transitions, 1087 flow [2024-06-14 12:56:35,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:35,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:35,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:35,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:56:35,315 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)] === [2024-06-14 12:56:35,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:35,315 INFO L85 PathProgramCache]: Analyzing trace with hash -213649175, now seen corresponding path program 2 times [2024-06-14 12:56:35,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:35,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316798337] [2024-06-14 12:56:35,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:35,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:35,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:38,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:38,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:38,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316798337] [2024-06-14 12:56:38,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316798337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:38,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:38,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:38,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448300370] [2024-06-14 12:56:38,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:38,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:38,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:38,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:38,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:38,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:56:38,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 118 transitions, 1087 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 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) [2024-06-14 12:56:38,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:38,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:56:38,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:39,512 INFO L124 PetriNetUnfolderBase]: 1930/2896 cut-off events. [2024-06-14 12:56:39,513 INFO L125 PetriNetUnfolderBase]: For 33869/33869 co-relation queries the response was YES. [2024-06-14 12:56:39,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15559 conditions, 2896 events. 1930/2896 cut-off events. For 33869/33869 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 13144 event pairs, 547 based on Foata normal form. 2/2896 useless extension candidates. Maximal degree in co-relation 15516. Up to 2800 conditions per place. [2024-06-14 12:56:39,528 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 135 selfloop transitions, 20 changer transitions 0/158 dead transitions. [2024-06-14 12:56:39,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 158 transitions, 1547 flow [2024-06-14 12:56:39,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:39,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:39,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:56:39,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 12:56:39,530 INFO L175 Difference]: Start difference. First operand has 93 places, 118 transitions, 1087 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:56:39,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 158 transitions, 1547 flow [2024-06-14 12:56:39,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 158 transitions, 1503 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-14 12:56:39,557 INFO L231 Difference]: Finished difference. Result has 99 places, 121 transitions, 1139 flow [2024-06-14 12:56:39,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1043, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1139, PETRI_PLACES=99, PETRI_TRANSITIONS=121} [2024-06-14 12:56:39,558 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 55 predicate places. [2024-06-14 12:56:39,558 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 121 transitions, 1139 flow [2024-06-14 12:56:39,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 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) [2024-06-14 12:56:39,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:39,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:39,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:56:39,559 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)] === [2024-06-14 12:56:39,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:39,559 INFO L85 PathProgramCache]: Analyzing trace with hash 783970272, now seen corresponding path program 2 times [2024-06-14 12:56:39,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:39,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672367551] [2024-06-14 12:56:39,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:39,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:39,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:41,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:41,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:41,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672367551] [2024-06-14 12:56:41,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672367551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:41,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:41,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:56:41,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476433196] [2024-06-14 12:56:41,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:41,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:56:41,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:41,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:56:41,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:56:41,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:56:41,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 121 transitions, 1139 flow. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:41,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:41,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:56:41,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:42,297 INFO L124 PetriNetUnfolderBase]: 1956/2936 cut-off events. [2024-06-14 12:56:42,298 INFO L125 PetriNetUnfolderBase]: For 39008/39015 co-relation queries the response was YES. [2024-06-14 12:56:42,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16262 conditions, 2936 events. 1956/2936 cut-off events. For 39008/39015 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 13359 event pairs, 544 based on Foata normal form. 10/2942 useless extension candidates. Maximal degree in co-relation 16216. Up to 2759 conditions per place. [2024-06-14 12:56:42,316 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 115 selfloop transitions, 35 changer transitions 0/153 dead transitions. [2024-06-14 12:56:42,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 153 transitions, 1582 flow [2024-06-14 12:56:42,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:42,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:42,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-14 12:56:42,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38205980066445183 [2024-06-14 12:56:42,326 INFO L175 Difference]: Start difference. First operand has 99 places, 121 transitions, 1139 flow. Second operand 7 states and 115 transitions. [2024-06-14 12:56:42,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 153 transitions, 1582 flow [2024-06-14 12:56:42,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 153 transitions, 1510 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 12:56:42,356 INFO L231 Difference]: Finished difference. Result has 101 places, 126 transitions, 1222 flow [2024-06-14 12:56:42,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1067, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1222, PETRI_PLACES=101, PETRI_TRANSITIONS=126} [2024-06-14 12:56:42,356 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 57 predicate places. [2024-06-14 12:56:42,357 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 126 transitions, 1222 flow [2024-06-14 12:56:42,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:42,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:42,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:42,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:56:42,357 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:42,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:42,358 INFO L85 PathProgramCache]: Analyzing trace with hash 427299385, now seen corresponding path program 3 times [2024-06-14 12:56:42,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:42,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970029859] [2024-06-14 12:56:42,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:42,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:42,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:44,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:44,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:44,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970029859] [2024-06-14 12:56:44,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970029859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:44,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:44,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:44,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739408976] [2024-06-14 12:56:44,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:44,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:44,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:44,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:44,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:44,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:56:44,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 126 transitions, 1222 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 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) [2024-06-14 12:56:44,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:44,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:56:44,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:45,987 INFO L124 PetriNetUnfolderBase]: 2222/3324 cut-off events. [2024-06-14 12:56:45,987 INFO L125 PetriNetUnfolderBase]: For 49622/49634 co-relation queries the response was YES. [2024-06-14 12:56:45,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19052 conditions, 3324 events. 2222/3324 cut-off events. For 49622/49634 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15446 event pairs, 566 based on Foata normal form. 10/3327 useless extension candidates. Maximal degree in co-relation 19004. Up to 2745 conditions per place. [2024-06-14 12:56:46,006 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 117 selfloop transitions, 70 changer transitions 0/190 dead transitions. [2024-06-14 12:56:46,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 190 transitions, 2016 flow [2024-06-14 12:56:46,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:56:46,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:56:46,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 12:56:46,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-14 12:56:46,012 INFO L175 Difference]: Start difference. First operand has 101 places, 126 transitions, 1222 flow. Second operand 9 states and 163 transitions. [2024-06-14 12:56:46,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 190 transitions, 2016 flow [2024-06-14 12:56:46,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 190 transitions, 1881 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 12:56:46,045 INFO L231 Difference]: Finished difference. Result has 106 places, 144 transitions, 1527 flow [2024-06-14 12:56:46,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1113, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1527, PETRI_PLACES=106, PETRI_TRANSITIONS=144} [2024-06-14 12:56:46,046 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 62 predicate places. [2024-06-14 12:56:46,046 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 144 transitions, 1527 flow [2024-06-14 12:56:46,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 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) [2024-06-14 12:56:46,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:46,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:46,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:56:46,048 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:46,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:46,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1708219166, now seen corresponding path program 3 times [2024-06-14 12:56:46,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:46,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093131516] [2024-06-14 12:56:46,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:46,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:46,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:47,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:47,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093131516] [2024-06-14 12:56:47,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093131516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:47,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:47,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:56:47,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760480406] [2024-06-14 12:56:47,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:47,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:56:47,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:47,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:56:47,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:56:47,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:56:47,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 144 transitions, 1527 flow. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:47,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:47,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:56:47,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:48,890 INFO L124 PetriNetUnfolderBase]: 2207/3301 cut-off events. [2024-06-14 12:56:48,891 INFO L125 PetriNetUnfolderBase]: For 55411/55420 co-relation queries the response was YES. [2024-06-14 12:56:48,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20829 conditions, 3301 events. 2207/3301 cut-off events. For 55411/55420 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15228 event pairs, 618 based on Foata normal form. 14/3311 useless extension candidates. Maximal degree in co-relation 20780. Up to 3023 conditions per place. [2024-06-14 12:56:48,913 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 126 selfloop transitions, 44 changer transitions 0/173 dead transitions. [2024-06-14 12:56:48,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 173 transitions, 1967 flow [2024-06-14 12:56:48,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:48,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:48,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 12:56:48,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-14 12:56:48,915 INFO L175 Difference]: Start difference. First operand has 106 places, 144 transitions, 1527 flow. Second operand 7 states and 116 transitions. [2024-06-14 12:56:48,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 173 transitions, 1967 flow [2024-06-14 12:56:48,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 173 transitions, 1851 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 12:56:48,970 INFO L231 Difference]: Finished difference. Result has 108 places, 144 transitions, 1514 flow [2024-06-14 12:56:48,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1415, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1514, PETRI_PLACES=108, PETRI_TRANSITIONS=144} [2024-06-14 12:56:48,971 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 64 predicate places. [2024-06-14 12:56:48,971 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 144 transitions, 1514 flow [2024-06-14 12:56:48,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:48,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:48,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:48,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:56:48,971 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)] === [2024-06-14 12:56:48,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:48,972 INFO L85 PathProgramCache]: Analyzing trace with hash 434835591, now seen corresponding path program 4 times [2024-06-14 12:56:48,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:48,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707683436] [2024-06-14 12:56:48,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:48,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:48,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:51,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:51,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:51,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707683436] [2024-06-14 12:56:51,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707683436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:51,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:51,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:51,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880728251] [2024-06-14 12:56:51,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:51,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:51,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:51,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:51,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:51,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:56:51,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 144 transitions, 1514 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 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) [2024-06-14 12:56:51,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:51,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:56:51,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:52,278 INFO L124 PetriNetUnfolderBase]: 2192/3280 cut-off events. [2024-06-14 12:56:52,278 INFO L125 PetriNetUnfolderBase]: For 58391/58400 co-relation queries the response was YES. [2024-06-14 12:56:52,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20836 conditions, 3280 events. 2192/3280 cut-off events. For 58391/58400 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15153 event pairs, 616 based on Foata normal form. 14/3290 useless extension candidates. Maximal degree in co-relation 20785. Up to 2978 conditions per place. [2024-06-14 12:56:52,297 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 123 selfloop transitions, 50 changer transitions 0/176 dead transitions. [2024-06-14 12:56:52,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 176 transitions, 1961 flow [2024-06-14 12:56:52,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:52,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:52,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:56:52,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-14 12:56:52,299 INFO L175 Difference]: Start difference. First operand has 108 places, 144 transitions, 1514 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:56:52,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 176 transitions, 1961 flow [2024-06-14 12:56:52,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 176 transitions, 1810 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-14 12:56:52,349 INFO L231 Difference]: Finished difference. Result has 111 places, 144 transitions, 1474 flow [2024-06-14 12:56:52,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1363, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1474, PETRI_PLACES=111, PETRI_TRANSITIONS=144} [2024-06-14 12:56:52,350 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 67 predicate places. [2024-06-14 12:56:52,350 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 144 transitions, 1474 flow [2024-06-14 12:56:52,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 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) [2024-06-14 12:56:52,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:52,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:52,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:56:52,350 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)] === [2024-06-14 12:56:52,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:52,351 INFO L85 PathProgramCache]: Analyzing trace with hash 663692658, now seen corresponding path program 1 times [2024-06-14 12:56:52,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:52,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607573994] [2024-06-14 12:56:52,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:52,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:52,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:54,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:54,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:54,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607573994] [2024-06-14 12:56:54,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607573994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:54,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:54,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:56:54,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881581497] [2024-06-14 12:56:54,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:54,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:56:54,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:54,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:56:54,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:56:54,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:56:54,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 144 transitions, 1474 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:54,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:54,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:56:54,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:56,287 INFO L124 PetriNetUnfolderBase]: 2364/3563 cut-off events. [2024-06-14 12:56:56,287 INFO L125 PetriNetUnfolderBase]: For 70495/70507 co-relation queries the response was YES. [2024-06-14 12:56:56,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22918 conditions, 3563 events. 2364/3563 cut-off events. For 70495/70507 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16951 event pairs, 506 based on Foata normal form. 12/3568 useless extension candidates. Maximal degree in co-relation 22866. Up to 2871 conditions per place. [2024-06-14 12:56:56,313 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 129 selfloop transitions, 71 changer transitions 0/203 dead transitions. [2024-06-14 12:56:56,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 203 transitions, 2217 flow [2024-06-14 12:56:56,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:56:56,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:56:56,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:56:56,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-14 12:56:56,326 INFO L175 Difference]: Start difference. First operand has 111 places, 144 transitions, 1474 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:56:56,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 203 transitions, 2217 flow [2024-06-14 12:56:56,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 203 transitions, 2099 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 12:56:56,382 INFO L231 Difference]: Finished difference. Result has 113 places, 148 transitions, 1597 flow [2024-06-14 12:56:56,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1356, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1597, PETRI_PLACES=113, PETRI_TRANSITIONS=148} [2024-06-14 12:56:56,382 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-14 12:56:56,382 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 148 transitions, 1597 flow [2024-06-14 12:56:56,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:56,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:56,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:56,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:56:56,383 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)] === [2024-06-14 12:56:56,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:56,383 INFO L85 PathProgramCache]: Analyzing trace with hash 2114060160, now seen corresponding path program 1 times [2024-06-14 12:56:56,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:56,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715396637] [2024-06-14 12:56:56,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:56,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:56,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:58,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:58,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:58,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715396637] [2024-06-14 12:56:58,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715396637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:58,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:58,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:58,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2688046] [2024-06-14 12:56:58,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:58,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:58,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:58,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:58,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:58,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:56:58,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 148 transitions, 1597 flow. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:58,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:58,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:56:58,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:00,221 INFO L124 PetriNetUnfolderBase]: 2390/3598 cut-off events. [2024-06-14 12:57:00,221 INFO L125 PetriNetUnfolderBase]: For 77830/77839 co-relation queries the response was YES. [2024-06-14 12:57:00,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23659 conditions, 3598 events. 2390/3598 cut-off events. For 77830/77839 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17130 event pairs, 622 based on Foata normal form. 12/3606 useless extension candidates. Maximal degree in co-relation 23606. Up to 3470 conditions per place. [2024-06-14 12:57:00,242 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 165 selfloop transitions, 22 changer transitions 0/190 dead transitions. [2024-06-14 12:57:00,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 190 transitions, 2137 flow [2024-06-14 12:57:00,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:00,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:00,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:57:00,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-14 12:57:00,244 INFO L175 Difference]: Start difference. First operand has 113 places, 148 transitions, 1597 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:57:00,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 190 transitions, 2137 flow [2024-06-14 12:57:00,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 190 transitions, 2006 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 12:57:00,303 INFO L231 Difference]: Finished difference. Result has 116 places, 151 transitions, 1572 flow [2024-06-14 12:57:00,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1466, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1572, PETRI_PLACES=116, PETRI_TRANSITIONS=151} [2024-06-14 12:57:00,303 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 72 predicate places. [2024-06-14 12:57:00,304 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 151 transitions, 1572 flow [2024-06-14 12:57:00,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:00,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:00,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:00,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:57:00,304 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:00,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:00,305 INFO L85 PathProgramCache]: Analyzing trace with hash 356797056, now seen corresponding path program 2 times [2024-06-14 12:57:00,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:00,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745728347] [2024-06-14 12:57:00,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:00,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:00,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:02,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:02,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:02,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745728347] [2024-06-14 12:57:02,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745728347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:02,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:02,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:02,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328093408] [2024-06-14 12:57:02,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:02,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:02,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:02,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:02,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:02,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:57:02,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 151 transitions, 1572 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:02,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:02,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:57:02,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:04,183 INFO L124 PetriNetUnfolderBase]: 2410/3633 cut-off events. [2024-06-14 12:57:04,184 INFO L125 PetriNetUnfolderBase]: For 84740/84752 co-relation queries the response was YES. [2024-06-14 12:57:04,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24292 conditions, 3633 events. 2410/3633 cut-off events. For 84740/84752 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17324 event pairs, 631 based on Foata normal form. 12/3638 useless extension candidates. Maximal degree in co-relation 24237. Up to 3217 conditions per place. [2024-06-14 12:57:04,209 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 130 selfloop transitions, 68 changer transitions 0/201 dead transitions. [2024-06-14 12:57:04,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 201 transitions, 2155 flow [2024-06-14 12:57:04,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:57:04,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:57:04,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 12:57:04,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-14 12:57:04,211 INFO L175 Difference]: Start difference. First operand has 116 places, 151 transitions, 1572 flow. Second operand 9 states and 163 transitions. [2024-06-14 12:57:04,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 201 transitions, 2155 flow [2024-06-14 12:57:04,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 201 transitions, 2077 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 12:57:04,297 INFO L231 Difference]: Finished difference. Result has 119 places, 153 transitions, 1687 flow [2024-06-14 12:57:04,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1494, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1687, PETRI_PLACES=119, PETRI_TRANSITIONS=153} [2024-06-14 12:57:04,298 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 75 predicate places. [2024-06-14 12:57:04,298 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 153 transitions, 1687 flow [2024-06-14 12:57:04,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:04,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:04,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:04,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:57:04,299 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:04,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:04,299 INFO L85 PathProgramCache]: Analyzing trace with hash 2116861320, now seen corresponding path program 2 times [2024-06-14 12:57:04,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:04,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515573007] [2024-06-14 12:57:04,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:04,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:04,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:07,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:07,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:07,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515573007] [2024-06-14 12:57:07,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515573007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:07,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:07,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:57:07,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947153349] [2024-06-14 12:57:07,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:07,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:57:07,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:07,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:57:07,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:57:07,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:57:07,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 153 transitions, 1687 flow. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:07,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:07,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:57:07,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:08,455 INFO L124 PetriNetUnfolderBase]: 2436/3668 cut-off events. [2024-06-14 12:57:08,455 INFO L125 PetriNetUnfolderBase]: For 91981/91990 co-relation queries the response was YES. [2024-06-14 12:57:08,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25012 conditions, 3668 events. 2436/3668 cut-off events. For 91981/91990 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17495 event pairs, 580 based on Foata normal form. 12/3676 useless extension candidates. Maximal degree in co-relation 24956. Up to 3531 conditions per place. [2024-06-14 12:57:08,481 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 167 selfloop transitions, 22 changer transitions 0/192 dead transitions. [2024-06-14 12:57:08,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 192 transitions, 2231 flow [2024-06-14 12:57:08,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:08,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:08,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:57:08,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-14 12:57:08,483 INFO L175 Difference]: Start difference. First operand has 119 places, 153 transitions, 1687 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:57:08,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 192 transitions, 2231 flow [2024-06-14 12:57:08,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 192 transitions, 2060 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-14 12:57:08,563 INFO L231 Difference]: Finished difference. Result has 120 places, 156 transitions, 1628 flow [2024-06-14 12:57:08,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1516, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1628, PETRI_PLACES=120, PETRI_TRANSITIONS=156} [2024-06-14 12:57:08,563 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 76 predicate places. [2024-06-14 12:57:08,564 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 156 transitions, 1628 flow [2024-06-14 12:57:08,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:08,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:08,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:08,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:57:08,564 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:08,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:08,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1966812270, now seen corresponding path program 3 times [2024-06-14 12:57:08,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:08,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840335359] [2024-06-14 12:57:08,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:08,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:08,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:11,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:11,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:11,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840335359] [2024-06-14 12:57:11,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840335359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:11,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:11,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:57:11,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481107189] [2024-06-14 12:57:11,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:11,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:57:11,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:11,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:57:11,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:57:11,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:57:11,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 156 transitions, 1628 flow. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:11,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:11,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:57:11,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:12,935 INFO L124 PetriNetUnfolderBase]: 2462/3706 cut-off events. [2024-06-14 12:57:12,935 INFO L125 PetriNetUnfolderBase]: For 98650/98659 co-relation queries the response was YES. [2024-06-14 12:57:12,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25509 conditions, 3706 events. 2462/3706 cut-off events. For 98650/98659 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17709 event pairs, 594 based on Foata normal form. 12/3714 useless extension candidates. Maximal degree in co-relation 25452. Up to 3536 conditions per place. [2024-06-14 12:57:12,963 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 169 selfloop transitions, 28 changer transitions 0/200 dead transitions. [2024-06-14 12:57:12,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 200 transitions, 2208 flow [2024-06-14 12:57:12,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:57:12,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:57:12,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 12:57:12,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37467700258397935 [2024-06-14 12:57:12,965 INFO L175 Difference]: Start difference. First operand has 120 places, 156 transitions, 1628 flow. Second operand 9 states and 145 transitions. [2024-06-14 12:57:12,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 200 transitions, 2208 flow [2024-06-14 12:57:13,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 200 transitions, 2124 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 12:57:13,045 INFO L231 Difference]: Finished difference. Result has 123 places, 159 transitions, 1678 flow [2024-06-14 12:57:13,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1544, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1678, PETRI_PLACES=123, PETRI_TRANSITIONS=159} [2024-06-14 12:57:13,046 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 79 predicate places. [2024-06-14 12:57:13,046 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 159 transitions, 1678 flow [2024-06-14 12:57:13,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:13,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:13,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:13,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:57:13,062 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:13,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:13,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1966812146, now seen corresponding path program 3 times [2024-06-14 12:57:13,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:13,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499500634] [2024-06-14 12:57:13,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:13,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:17,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:17,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:17,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499500634] [2024-06-14 12:57:17,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499500634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:17,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:17,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:17,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655560849] [2024-06-14 12:57:17,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:17,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:17,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:17,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:17,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:17,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:57:17,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 159 transitions, 1678 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:17,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:17,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:57:17,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:18,756 INFO L124 PetriNetUnfolderBase]: 2454/3692 cut-off events. [2024-06-14 12:57:18,757 INFO L125 PetriNetUnfolderBase]: For 104748/104748 co-relation queries the response was YES. [2024-06-14 12:57:18,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25870 conditions, 3692 events. 2454/3692 cut-off events. For 104748/104748 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17603 event pairs, 606 based on Foata normal form. 4/3694 useless extension candidates. Maximal degree in co-relation 25812. Up to 3574 conditions per place. [2024-06-14 12:57:18,782 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 179 selfloop transitions, 22 changer transitions 0/204 dead transitions. [2024-06-14 12:57:18,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 204 transitions, 2258 flow [2024-06-14 12:57:18,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:57:18,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:57:18,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 12:57:18,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772609819121447 [2024-06-14 12:57:18,786 INFO L175 Difference]: Start difference. First operand has 123 places, 159 transitions, 1678 flow. Second operand 9 states and 146 transitions. [2024-06-14 12:57:18,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 204 transitions, 2258 flow [2024-06-14 12:57:18,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 204 transitions, 2154 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-14 12:57:18,876 INFO L231 Difference]: Finished difference. Result has 125 places, 161 transitions, 1683 flow [2024-06-14 12:57:18,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1576, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1683, PETRI_PLACES=125, PETRI_TRANSITIONS=161} [2024-06-14 12:57:18,876 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 81 predicate places. [2024-06-14 12:57:18,876 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 161 transitions, 1683 flow [2024-06-14 12:57:18,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:18,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:18,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:18,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:57:18,877 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:18,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:18,877 INFO L85 PathProgramCache]: Analyzing trace with hash 2043684344, now seen corresponding path program 1 times [2024-06-14 12:57:18,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:18,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474788940] [2024-06-14 12:57:18,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:18,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:18,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:21,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:21,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474788940] [2024-06-14 12:57:21,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474788940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:21,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:21,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:57:21,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604277635] [2024-06-14 12:57:21,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:21,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:57:21,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:21,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:57:21,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:57:21,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:57:21,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 161 transitions, 1683 flow. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:21,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:21,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:57:21,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:22,578 INFO L124 PetriNetUnfolderBase]: 2449/3687 cut-off events. [2024-06-14 12:57:22,578 INFO L125 PetriNetUnfolderBase]: For 102456/102465 co-relation queries the response was YES. [2024-06-14 12:57:22,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25448 conditions, 3687 events. 2449/3687 cut-off events. For 102456/102465 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17605 event pairs, 611 based on Foata normal form. 10/3693 useless extension candidates. Maximal degree in co-relation 25389. Up to 3453 conditions per place. [2024-06-14 12:57:22,601 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 139 selfloop transitions, 48 changer transitions 0/190 dead transitions. [2024-06-14 12:57:22,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 190 transitions, 2185 flow [2024-06-14 12:57:22,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:57:22,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:57:22,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 12:57:22,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-14 12:57:22,603 INFO L175 Difference]: Start difference. First operand has 125 places, 161 transitions, 1683 flow. Second operand 7 states and 117 transitions. [2024-06-14 12:57:22,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 190 transitions, 2185 flow [2024-06-14 12:57:22,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 190 transitions, 2096 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-14 12:57:22,670 INFO L231 Difference]: Finished difference. Result has 125 places, 164 transitions, 1759 flow [2024-06-14 12:57:22,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1594, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1759, PETRI_PLACES=125, PETRI_TRANSITIONS=164} [2024-06-14 12:57:22,671 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 81 predicate places. [2024-06-14 12:57:22,671 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 164 transitions, 1759 flow [2024-06-14 12:57:22,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:22,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:22,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:22,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:57:22,672 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:22,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:22,672 INFO L85 PathProgramCache]: Analyzing trace with hash -938703748, now seen corresponding path program 4 times [2024-06-14 12:57:22,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:22,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684479685] [2024-06-14 12:57:22,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:22,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:22,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:25,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:25,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:25,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684479685] [2024-06-14 12:57:25,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684479685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:25,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:25,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:57:25,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207515569] [2024-06-14 12:57:25,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:25,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:57:25,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:25,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:57:25,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:57:25,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:57:25,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 164 transitions, 1759 flow. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:25,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:25,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:57:25,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:26,312 INFO L124 PetriNetUnfolderBase]: 2475/3725 cut-off events. [2024-06-14 12:57:26,312 INFO L125 PetriNetUnfolderBase]: For 110349/110358 co-relation queries the response was YES. [2024-06-14 12:57:26,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26090 conditions, 3725 events. 2475/3725 cut-off events. For 110349/110358 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17857 event pairs, 613 based on Foata normal form. 12/3733 useless extension candidates. Maximal degree in co-relation 26030. Up to 3457 conditions per place. [2024-06-14 12:57:26,340 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 145 selfloop transitions, 51 changer transitions 0/199 dead transitions. [2024-06-14 12:57:26,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 199 transitions, 2312 flow [2024-06-14 12:57:26,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:26,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:26,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:57:26,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 12:57:26,342 INFO L175 Difference]: Start difference. First operand has 125 places, 164 transitions, 1759 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:57:26,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 199 transitions, 2312 flow [2024-06-14 12:57:26,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 199 transitions, 2188 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 12:57:26,428 INFO L231 Difference]: Finished difference. Result has 127 places, 167 transitions, 1815 flow [2024-06-14 12:57:26,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1635, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1815, PETRI_PLACES=127, PETRI_TRANSITIONS=167} [2024-06-14 12:57:26,429 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 83 predicate places. [2024-06-14 12:57:26,430 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 167 transitions, 1815 flow [2024-06-14 12:57:26,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:26,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:26,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:26,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:57:26,430 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:26,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:26,431 INFO L85 PathProgramCache]: Analyzing trace with hash -938876728, now seen corresponding path program 5 times [2024-06-14 12:57:26,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:26,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835635707] [2024-06-14 12:57:26,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:26,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:28,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:28,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:28,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835635707] [2024-06-14 12:57:28,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835635707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:28,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:28,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:57:28,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352885472] [2024-06-14 12:57:28,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:28,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:57:28,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:28,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:57:28,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:57:28,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:57:28,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 167 transitions, 1815 flow. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:28,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:28,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:57:28,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:30,019 INFO L124 PetriNetUnfolderBase]: 2501/3763 cut-off events. [2024-06-14 12:57:30,019 INFO L125 PetriNetUnfolderBase]: For 112831/112840 co-relation queries the response was YES. [2024-06-14 12:57:30,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26674 conditions, 3763 events. 2501/3763 cut-off events. For 112831/112840 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 18027 event pairs, 613 based on Foata normal form. 12/3771 useless extension candidates. Maximal degree in co-relation 26614. Up to 3379 conditions per place. [2024-06-14 12:57:30,050 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 141 selfloop transitions, 60 changer transitions 0/204 dead transitions. [2024-06-14 12:57:30,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 204 transitions, 2395 flow [2024-06-14 12:57:30,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:30,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:30,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:57:30,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 12:57:30,052 INFO L175 Difference]: Start difference. First operand has 127 places, 167 transitions, 1815 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:57:30,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 204 transitions, 2395 flow [2024-06-14 12:57:30,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 204 transitions, 2247 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 12:57:30,148 INFO L231 Difference]: Finished difference. Result has 129 places, 170 transitions, 1870 flow [2024-06-14 12:57:30,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1667, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1870, PETRI_PLACES=129, PETRI_TRANSITIONS=170} [2024-06-14 12:57:30,149 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 85 predicate places. [2024-06-14 12:57:30,149 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 170 transitions, 1870 flow [2024-06-14 12:57:30,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:30,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:30,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:30,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:57:30,150 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:30,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:30,150 INFO L85 PathProgramCache]: Analyzing trace with hash -938881502, now seen corresponding path program 4 times [2024-06-14 12:57:30,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:30,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068887559] [2024-06-14 12:57:30,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:30,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:30,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:32,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:32,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068887559] [2024-06-14 12:57:32,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068887559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:32,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:32,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:32,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650361809] [2024-06-14 12:57:32,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:32,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:32,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:32,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:32,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:32,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:57:32,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 170 transitions, 1870 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:32,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:32,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:57:32,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:34,035 INFO L124 PetriNetUnfolderBase]: 2521/3795 cut-off events. [2024-06-14 12:57:34,035 INFO L125 PetriNetUnfolderBase]: For 122013/122019 co-relation queries the response was YES. [2024-06-14 12:57:34,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27423 conditions, 3795 events. 2521/3795 cut-off events. For 122013/122019 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18247 event pairs, 617 based on Foata normal form. 8/3798 useless extension candidates. Maximal degree in co-relation 27362. Up to 3586 conditions per place. [2024-06-14 12:57:34,061 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 169 selfloop transitions, 40 changer transitions 0/212 dead transitions. [2024-06-14 12:57:34,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 212 transitions, 2456 flow [2024-06-14 12:57:34,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:57:34,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:57:34,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 12:57:34,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-14 12:57:34,070 INFO L175 Difference]: Start difference. First operand has 129 places, 170 transitions, 1870 flow. Second operand 9 states and 147 transitions. [2024-06-14 12:57:34,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 212 transitions, 2456 flow [2024-06-14 12:57:34,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 212 transitions, 2283 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 12:57:34,159 INFO L231 Difference]: Finished difference. Result has 132 places, 172 transitions, 1838 flow [2024-06-14 12:57:34,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1697, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1838, PETRI_PLACES=132, PETRI_TRANSITIONS=172} [2024-06-14 12:57:34,159 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 88 predicate places. [2024-06-14 12:57:34,159 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 172 transitions, 1838 flow [2024-06-14 12:57:34,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:34,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:34,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:34,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:57:34,164 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:34,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:34,165 INFO L85 PathProgramCache]: Analyzing trace with hash 2043500018, now seen corresponding path program 6 times [2024-06-14 12:57:34,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:34,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655421964] [2024-06-14 12:57:34,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:34,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:34,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:36,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:36,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:36,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655421964] [2024-06-14 12:57:36,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655421964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:36,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:36,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:57:36,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158790351] [2024-06-14 12:57:36,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:36,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:57:36,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:36,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:57:36,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:57:36,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:57:36,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 172 transitions, 1838 flow. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:36,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:36,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:57:36,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:37,881 INFO L124 PetriNetUnfolderBase]: 2537/3819 cut-off events. [2024-06-14 12:57:37,881 INFO L125 PetriNetUnfolderBase]: For 126555/126564 co-relation queries the response was YES. [2024-06-14 12:57:37,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27440 conditions, 3819 events. 2537/3819 cut-off events. For 126555/126564 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 18325 event pairs, 591 based on Foata normal form. 12/3827 useless extension candidates. Maximal degree in co-relation 27378. Up to 3401 conditions per place. [2024-06-14 12:57:37,912 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 159 selfloop transitions, 60 changer transitions 0/222 dead transitions. [2024-06-14 12:57:37,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 222 transitions, 2523 flow [2024-06-14 12:57:37,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:57:37,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:57:37,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 12:57:37,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-14 12:57:37,913 INFO L175 Difference]: Start difference. First operand has 132 places, 172 transitions, 1838 flow. Second operand 9 states and 147 transitions. [2024-06-14 12:57:37,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 222 transitions, 2523 flow [2024-06-14 12:57:37,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 222 transitions, 2417 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 12:57:38,000 INFO L231 Difference]: Finished difference. Result has 136 places, 181 transitions, 2010 flow [2024-06-14 12:57:38,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1732, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2010, PETRI_PLACES=136, PETRI_TRANSITIONS=181} [2024-06-14 12:57:38,000 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2024-06-14 12:57:38,001 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 181 transitions, 2010 flow [2024-06-14 12:57:38,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:38,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:38,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:38,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:57:38,001 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:38,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:38,001 INFO L85 PathProgramCache]: Analyzing trace with hash 595003412, now seen corresponding path program 5 times [2024-06-14 12:57:38,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:38,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378938313] [2024-06-14 12:57:38,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:38,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:38,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:40,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:40,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378938313] [2024-06-14 12:57:40,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378938313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:40,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:40,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:40,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687888849] [2024-06-14 12:57:40,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:40,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:40,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:40,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:40,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:40,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:57:40,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 181 transitions, 2010 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:40,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:40,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:57:40,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:42,213 INFO L124 PetriNetUnfolderBase]: 2561/3867 cut-off events. [2024-06-14 12:57:42,214 INFO L125 PetriNetUnfolderBase]: For 141776/141785 co-relation queries the response was YES. [2024-06-14 12:57:42,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27740 conditions, 3867 events. 2561/3867 cut-off events. For 141776/141785 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 18745 event pairs, 593 based on Foata normal form. 48/3911 useless extension candidates. Maximal degree in co-relation 27676. Up to 3268 conditions per place. [2024-06-14 12:57:42,243 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 166 selfloop transitions, 56 changer transitions 0/225 dead transitions. [2024-06-14 12:57:42,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 225 transitions, 2673 flow [2024-06-14 12:57:42,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:57:42,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:57:42,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 12:57:42,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:57:42,245 INFO L175 Difference]: Start difference. First operand has 136 places, 181 transitions, 2010 flow. Second operand 9 states and 153 transitions. [2024-06-14 12:57:42,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 225 transitions, 2673 flow [2024-06-14 12:57:42,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 225 transitions, 2490 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-14 12:57:42,351 INFO L231 Difference]: Finished difference. Result has 139 places, 182 transitions, 1998 flow [2024-06-14 12:57:42,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1833, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1998, PETRI_PLACES=139, PETRI_TRANSITIONS=182} [2024-06-14 12:57:42,352 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-14 12:57:42,352 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 182 transitions, 1998 flow [2024-06-14 12:57:42,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:42,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:42,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:42,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:57:42,353 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:42,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:42,353 INFO L85 PathProgramCache]: Analyzing trace with hash 644572892, now seen corresponding path program 1 times [2024-06-14 12:57:42,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:42,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487532322] [2024-06-14 12:57:42,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:42,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:45,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:45,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:45,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487532322] [2024-06-14 12:57:45,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487532322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:45,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:45,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:57:45,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121636695] [2024-06-14 12:57:45,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:45,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:57:45,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:45,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:57:45,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:57:45,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:57:45,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 182 transitions, 1998 flow. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:45,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:45,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:57:45,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:46,460 INFO L124 PetriNetUnfolderBase]: 2581/3899 cut-off events. [2024-06-14 12:57:46,460 INFO L125 PetriNetUnfolderBase]: For 125251/125260 co-relation queries the response was YES. [2024-06-14 12:57:46,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27465 conditions, 3899 events. 2581/3899 cut-off events. For 125251/125260 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 18938 event pairs, 595 based on Foata normal form. 12/3907 useless extension candidates. Maximal degree in co-relation 27400. Up to 3672 conditions per place. [2024-06-14 12:57:46,485 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 168 selfloop transitions, 39 changer transitions 0/210 dead transitions. [2024-06-14 12:57:46,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 210 transitions, 2541 flow [2024-06-14 12:57:46,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:57:46,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:57:46,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 12:57:46,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-14 12:57:46,488 INFO L175 Difference]: Start difference. First operand has 139 places, 182 transitions, 1998 flow. Second operand 7 states and 116 transitions. [2024-06-14 12:57:46,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 210 transitions, 2541 flow [2024-06-14 12:57:46,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 210 transitions, 2422 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 12:57:46,584 INFO L231 Difference]: Finished difference. Result has 139 places, 184 transitions, 2020 flow [2024-06-14 12:57:46,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1879, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2020, PETRI_PLACES=139, PETRI_TRANSITIONS=184} [2024-06-14 12:57:46,585 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-14 12:57:46,585 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 184 transitions, 2020 flow [2024-06-14 12:57:46,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:46,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:46,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:46,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:57:46,585 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:46,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:46,586 INFO L85 PathProgramCache]: Analyzing trace with hash 601683230, now seen corresponding path program 2 times [2024-06-14 12:57:46,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:46,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356056189] [2024-06-14 12:57:46,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:46,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:46,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:49,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:49,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:49,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356056189] [2024-06-14 12:57:49,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356056189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:49,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:49,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:57:49,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251412438] [2024-06-14 12:57:49,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:49,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:57:49,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:49,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:57:49,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:57:49,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:57:49,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 184 transitions, 2020 flow. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:49,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:49,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:57:49,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:50,108 INFO L124 PetriNetUnfolderBase]: 2573/3887 cut-off events. [2024-06-14 12:57:50,108 INFO L125 PetriNetUnfolderBase]: For 128675/128684 co-relation queries the response was YES. [2024-06-14 12:57:50,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27430 conditions, 3887 events. 2573/3887 cut-off events. For 128675/128684 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 18892 event pairs, 534 based on Foata normal form. 12/3895 useless extension candidates. Maximal degree in co-relation 27364. Up to 3588 conditions per place. [2024-06-14 12:57:50,136 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 171 selfloop transitions, 39 changer transitions 0/213 dead transitions. [2024-06-14 12:57:50,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 213 transitions, 2573 flow [2024-06-14 12:57:50,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:57:50,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:57:50,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-14 12:57:50,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38205980066445183 [2024-06-14 12:57:50,138 INFO L175 Difference]: Start difference. First operand has 139 places, 184 transitions, 2020 flow. Second operand 7 states and 115 transitions. [2024-06-14 12:57:50,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 213 transitions, 2573 flow [2024-06-14 12:57:50,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 213 transitions, 2455 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 12:57:50,236 INFO L231 Difference]: Finished difference. Result has 141 places, 186 transitions, 2046 flow [2024-06-14 12:57:50,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1902, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2046, PETRI_PLACES=141, PETRI_TRANSITIONS=186} [2024-06-14 12:57:50,237 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 97 predicate places. [2024-06-14 12:57:50,237 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 186 transitions, 2046 flow [2024-06-14 12:57:50,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:50,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:50,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:50,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:57:50,237 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:50,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:50,238 INFO L85 PathProgramCache]: Analyzing trace with hash -900361979, now seen corresponding path program 1 times [2024-06-14 12:57:50,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:50,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096491572] [2024-06-14 12:57:50,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:50,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:52,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:52,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:52,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096491572] [2024-06-14 12:57:52,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096491572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:52,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:52,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:52,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536366634] [2024-06-14 12:57:52,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:52,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:52,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:52,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:52,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:52,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:57:52,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 186 transitions, 2046 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2024-06-14 12:57:52,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:52,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:57:52,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:54,419 INFO L124 PetriNetUnfolderBase]: 2765/4207 cut-off events. [2024-06-14 12:57:54,419 INFO L125 PetriNetUnfolderBase]: For 159715/159724 co-relation queries the response was YES. [2024-06-14 12:57:54,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30423 conditions, 4207 events. 2765/4207 cut-off events. For 159715/159724 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 21122 event pairs, 546 based on Foata normal form. 24/4227 useless extension candidates. Maximal degree in co-relation 30356. Up to 3675 conditions per place. [2024-06-14 12:57:54,450 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 214 selfloop transitions, 27 changer transitions 0/244 dead transitions. [2024-06-14 12:57:54,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 244 transitions, 2954 flow [2024-06-14 12:57:54,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:57:54,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:57:54,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 12:57:54,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 12:57:54,452 INFO L175 Difference]: Start difference. First operand has 141 places, 186 transitions, 2046 flow. Second operand 9 states and 159 transitions. [2024-06-14 12:57:54,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 244 transitions, 2954 flow [2024-06-14 12:57:54,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 244 transitions, 2831 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 12:57:54,584 INFO L231 Difference]: Finished difference. Result has 145 places, 188 transitions, 2073 flow [2024-06-14 12:57:54,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1923, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2073, PETRI_PLACES=145, PETRI_TRANSITIONS=188} [2024-06-14 12:57:54,585 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 101 predicate places. [2024-06-14 12:57:54,585 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 188 transitions, 2073 flow [2024-06-14 12:57:54,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2024-06-14 12:57:54,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:54,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:54,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:57:54,586 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:54,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:54,586 INFO L85 PathProgramCache]: Analyzing trace with hash 754944675, now seen corresponding path program 2 times [2024-06-14 12:57:54,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:54,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136891558] [2024-06-14 12:57:54,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:54,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:54,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:57,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:57,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:57,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136891558] [2024-06-14 12:57:57,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136891558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:57,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:57,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:57,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950679686] [2024-06-14 12:57:57,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:57,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:57,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:57,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:57,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:57,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:57:57,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 188 transitions, 2073 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2024-06-14 12:57:57,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:57,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:57:57,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:58,488 INFO L124 PetriNetUnfolderBase]: 2833/4331 cut-off events. [2024-06-14 12:57:58,488 INFO L125 PetriNetUnfolderBase]: For 170569/170617 co-relation queries the response was YES. [2024-06-14 12:57:58,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31330 conditions, 4331 events. 2833/4331 cut-off events. For 170569/170617 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 22127 event pairs, 701 based on Foata normal form. 50/4365 useless extension candidates. Maximal degree in co-relation 31262. Up to 3406 conditions per place. [2024-06-14 12:57:58,522 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 156 selfloop transitions, 87 changer transitions 0/246 dead transitions. [2024-06-14 12:57:58,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 246 transitions, 2956 flow [2024-06-14 12:57:58,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:57:58,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:57:58,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:57:58,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-14 12:57:58,524 INFO L175 Difference]: Start difference. First operand has 145 places, 188 transitions, 2073 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:57:58,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 246 transitions, 2956 flow [2024-06-14 12:57:58,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 246 transitions, 2903 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 12:57:58,699 INFO L231 Difference]: Finished difference. Result has 149 places, 189 transitions, 2246 flow [2024-06-14 12:57:58,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2020, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2246, PETRI_PLACES=149, PETRI_TRANSITIONS=189} [2024-06-14 12:57:58,699 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 105 predicate places. [2024-06-14 12:57:58,699 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 189 transitions, 2246 flow [2024-06-14 12:57:58,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2024-06-14 12:57:58,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:58,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:58,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:57:58,700 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:58,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:58,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1824187329, now seen corresponding path program 3 times [2024-06-14 12:57:58,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:58,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624019940] [2024-06-14 12:57:58,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:58,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:01,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:01,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:01,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624019940] [2024-06-14 12:58:01,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624019940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:01,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:01,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:58:01,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927275604] [2024-06-14 12:58:01,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:01,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:58:01,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:01,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:58:01,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:58:01,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:58:01,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 189 transitions, 2246 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2024-06-14 12:58:01,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:01,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:58:01,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:02,615 INFO L124 PetriNetUnfolderBase]: 2797/4275 cut-off events. [2024-06-14 12:58:02,616 INFO L125 PetriNetUnfolderBase]: For 170990/171038 co-relation queries the response was YES. [2024-06-14 12:58:02,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30788 conditions, 4275 events. 2797/4275 cut-off events. For 170990/171038 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 21762 event pairs, 707 based on Foata normal form. 54/4313 useless extension candidates. Maximal degree in co-relation 30718. Up to 3530 conditions per place. [2024-06-14 12:58:02,650 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 152 selfloop transitions, 85 changer transitions 0/240 dead transitions. [2024-06-14 12:58:02,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 240 transitions, 2909 flow [2024-06-14 12:58:02,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:58:02,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:58:02,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 12:58:02,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-14 12:58:02,652 INFO L175 Difference]: Start difference. First operand has 149 places, 189 transitions, 2246 flow. Second operand 9 states and 160 transitions. [2024-06-14 12:58:02,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 240 transitions, 2909 flow [2024-06-14 12:58:02,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 240 transitions, 2690 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-14 12:58:02,802 INFO L231 Difference]: Finished difference. Result has 151 places, 189 transitions, 2204 flow [2024-06-14 12:58:02,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2027, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2204, PETRI_PLACES=151, PETRI_TRANSITIONS=189} [2024-06-14 12:58:02,803 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 107 predicate places. [2024-06-14 12:58:02,803 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 189 transitions, 2204 flow [2024-06-14 12:58:02,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2024-06-14 12:58:02,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:02,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:02,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:58:02,804 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:02,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:02,804 INFO L85 PathProgramCache]: Analyzing trace with hash 841790307, now seen corresponding path program 1 times [2024-06-14 12:58:02,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:02,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232332150] [2024-06-14 12:58:02,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:02,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:06,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:06,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232332150] [2024-06-14 12:58:06,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232332150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:06,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:06,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:58:06,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929655943] [2024-06-14 12:58:06,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:06,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:58:06,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:06,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:58:06,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:58:06,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:58:06,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 189 transitions, 2204 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2024-06-14 12:58:06,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:06,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:58:06,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:07,411 INFO L124 PetriNetUnfolderBase]: 2817/4299 cut-off events. [2024-06-14 12:58:07,411 INFO L125 PetriNetUnfolderBase]: For 164873/164882 co-relation queries the response was YES. [2024-06-14 12:58:07,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30851 conditions, 4299 events. 2817/4299 cut-off events. For 164873/164882 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 21824 event pairs, 630 based on Foata normal form. 12/4307 useless extension candidates. Maximal degree in co-relation 30780. Up to 4168 conditions per place. [2024-06-14 12:58:07,445 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 203 selfloop transitions, 21 changer transitions 0/227 dead transitions. [2024-06-14 12:58:07,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 227 transitions, 2820 flow [2024-06-14 12:58:07,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:58:07,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:58:07,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:58:07,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-14 12:58:07,449 INFO L175 Difference]: Start difference. First operand has 151 places, 189 transitions, 2204 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:58:07,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 227 transitions, 2820 flow [2024-06-14 12:58:07,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 227 transitions, 2645 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-14 12:58:07,599 INFO L231 Difference]: Finished difference. Result has 151 places, 191 transitions, 2142 flow [2024-06-14 12:58:07,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2029, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2142, PETRI_PLACES=151, PETRI_TRANSITIONS=191} [2024-06-14 12:58:07,600 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 107 predicate places. [2024-06-14 12:58:07,600 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 191 transitions, 2142 flow [2024-06-14 12:58:07,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2024-06-14 12:58:07,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:07,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:07,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:58:07,601 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:07,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:07,601 INFO L85 PathProgramCache]: Analyzing trace with hash 841784355, now seen corresponding path program 4 times [2024-06-14 12:58:07,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:07,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706448110] [2024-06-14 12:58:07,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:07,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:11,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:11,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:11,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706448110] [2024-06-14 12:58:11,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706448110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:11,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:11,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:58:11,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019536650] [2024-06-14 12:58:11,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:11,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:58:11,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:11,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:58:11,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:58:11,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:58:11,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 191 transitions, 2142 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2024-06-14 12:58:11,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:11,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:58:11,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:12,713 INFO L124 PetriNetUnfolderBase]: 2905/4447 cut-off events. [2024-06-14 12:58:12,713 INFO L125 PetriNetUnfolderBase]: For 187779/187788 co-relation queries the response was YES. [2024-06-14 12:58:12,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31868 conditions, 4447 events. 2905/4447 cut-off events. For 187779/187788 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 22917 event pairs, 658 based on Foata normal form. 28/4471 useless extension candidates. Maximal degree in co-relation 31796. Up to 4130 conditions per place. [2024-06-14 12:58:12,750 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 211 selfloop transitions, 24 changer transitions 0/238 dead transitions. [2024-06-14 12:58:12,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 238 transitions, 2832 flow [2024-06-14 12:58:12,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:58:12,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:58:12,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 12:58:12,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3850129198966408 [2024-06-14 12:58:12,752 INFO L175 Difference]: Start difference. First operand has 151 places, 191 transitions, 2142 flow. Second operand 9 states and 149 transitions. [2024-06-14 12:58:12,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 238 transitions, 2832 flow [2024-06-14 12:58:12,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 238 transitions, 2737 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 12:58:12,934 INFO L231 Difference]: Finished difference. Result has 154 places, 192 transitions, 2154 flow [2024-06-14 12:58:12,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2047, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2154, PETRI_PLACES=154, PETRI_TRANSITIONS=192} [2024-06-14 12:58:12,934 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-14 12:58:12,935 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 192 transitions, 2154 flow [2024-06-14 12:58:12,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2024-06-14 12:58:12,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:12,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:12,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:58:12,935 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:12,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:12,936 INFO L85 PathProgramCache]: Analyzing trace with hash 841640205, now seen corresponding path program 5 times [2024-06-14 12:58:12,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:12,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528048865] [2024-06-14 12:58:12,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:12,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:12,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:17,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:17,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528048865] [2024-06-14 12:58:17,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528048865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:17,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:17,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:58:17,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896493169] [2024-06-14 12:58:17,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:17,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:58:17,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:17,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:58:17,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:58:17,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:58:17,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 192 transitions, 2154 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2024-06-14 12:58:17,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:17,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:58:17,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:18,547 INFO L124 PetriNetUnfolderBase]: 3041/4679 cut-off events. [2024-06-14 12:58:18,547 INFO L125 PetriNetUnfolderBase]: For 204482/204491 co-relation queries the response was YES. [2024-06-14 12:58:18,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33629 conditions, 4679 events. 3041/4679 cut-off events. For 204482/204491 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 24610 event pairs, 692 based on Foata normal form. 28/4703 useless extension candidates. Maximal degree in co-relation 33556. Up to 4195 conditions per place. [2024-06-14 12:58:18,585 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 210 selfloop transitions, 32 changer transitions 0/245 dead transitions. [2024-06-14 12:58:18,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 245 transitions, 2925 flow [2024-06-14 12:58:18,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:58:18,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:58:18,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-14 12:58:18,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37906976744186044 [2024-06-14 12:58:18,587 INFO L175 Difference]: Start difference. First operand has 154 places, 192 transitions, 2154 flow. Second operand 10 states and 163 transitions. [2024-06-14 12:58:18,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 245 transitions, 2925 flow [2024-06-14 12:58:18,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 245 transitions, 2837 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-14 12:58:18,799 INFO L231 Difference]: Finished difference. Result has 157 places, 194 transitions, 2248 flow [2024-06-14 12:58:18,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2089, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2248, PETRI_PLACES=157, PETRI_TRANSITIONS=194} [2024-06-14 12:58:18,800 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 113 predicate places. [2024-06-14 12:58:18,800 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 194 transitions, 2248 flow [2024-06-14 12:58:18,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2024-06-14 12:58:18,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:18,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:18,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:58:18,801 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:18,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:18,801 INFO L85 PathProgramCache]: Analyzing trace with hash 841636485, now seen corresponding path program 6 times [2024-06-14 12:58:18,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:18,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151303251] [2024-06-14 12:58:18,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:18,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:22,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:22,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:22,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151303251] [2024-06-14 12:58:22,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151303251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:22,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:22,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:58:22,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553687917] [2024-06-14 12:58:22,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:22,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:58:22,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:22,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:58:22,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:58:22,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:58:22,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 194 transitions, 2248 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2024-06-14 12:58:22,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:22,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:58:22,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:23,659 INFO L124 PetriNetUnfolderBase]: 3109/4795 cut-off events. [2024-06-14 12:58:23,659 INFO L125 PetriNetUnfolderBase]: For 211028/211037 co-relation queries the response was YES. [2024-06-14 12:58:23,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34482 conditions, 4795 events. 3109/4795 cut-off events. For 211028/211037 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 25495 event pairs, 682 based on Foata normal form. 24/4815 useless extension candidates. Maximal degree in co-relation 34408. Up to 4093 conditions per place. [2024-06-14 12:58:23,696 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 209 selfloop transitions, 33 changer transitions 0/245 dead transitions. [2024-06-14 12:58:23,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 245 transitions, 2986 flow [2024-06-14 12:58:23,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:58:23,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:58:23,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 12:58:23,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-14 12:58:23,697 INFO L175 Difference]: Start difference. First operand has 157 places, 194 transitions, 2248 flow. Second operand 9 states and 154 transitions. [2024-06-14 12:58:23,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 245 transitions, 2986 flow [2024-06-14 12:58:23,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 245 transitions, 2909 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-14 12:58:23,883 INFO L231 Difference]: Finished difference. Result has 158 places, 195 transitions, 2297 flow [2024-06-14 12:58:23,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2171, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2297, PETRI_PLACES=158, PETRI_TRANSITIONS=195} [2024-06-14 12:58:23,883 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-14 12:58:23,884 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 195 transitions, 2297 flow [2024-06-14 12:58:23,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2024-06-14 12:58:23,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:23,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:23,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:58:23,884 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:23,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:23,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1676362527, now seen corresponding path program 2 times [2024-06-14 12:58:23,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:23,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060604620] [2024-06-14 12:58:23,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:23,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:27,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:27,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:27,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060604620] [2024-06-14 12:58:27,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060604620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:27,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:27,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:58:27,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182039553] [2024-06-14 12:58:27,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:27,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:58:27,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:27,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:58:27,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:58:27,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:58:27,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 195 transitions, 2297 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2024-06-14 12:58:27,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:27,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:58:27,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:28,483 INFO L124 PetriNetUnfolderBase]: 3129/4827 cut-off events. [2024-06-14 12:58:28,484 INFO L125 PetriNetUnfolderBase]: For 209877/209886 co-relation queries the response was YES. [2024-06-14 12:58:28,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34827 conditions, 4827 events. 3129/4827 cut-off events. For 209877/209886 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 25753 event pairs, 674 based on Foata normal form. 12/4835 useless extension candidates. Maximal degree in co-relation 34752. Up to 4554 conditions per place. [2024-06-14 12:58:28,525 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 181 selfloop transitions, 45 changer transitions 0/229 dead transitions. [2024-06-14 12:58:28,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 229 transitions, 2885 flow [2024-06-14 12:58:28,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:58:28,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:58:28,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:58:28,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-14 12:58:28,527 INFO L175 Difference]: Start difference. First operand has 158 places, 195 transitions, 2297 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:58:28,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 229 transitions, 2885 flow [2024-06-14 12:58:28,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 229 transitions, 2787 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 12:58:28,748 INFO L231 Difference]: Finished difference. Result has 159 places, 197 transitions, 2344 flow [2024-06-14 12:58:28,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2199, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2344, PETRI_PLACES=159, PETRI_TRANSITIONS=197} [2024-06-14 12:58:28,749 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 115 predicate places. [2024-06-14 12:58:28,749 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 197 transitions, 2344 flow [2024-06-14 12:58:28,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2024-06-14 12:58:28,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:28,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:28,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:58:28,750 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:28,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:28,750 INFO L85 PathProgramCache]: Analyzing trace with hash 965164625, now seen corresponding path program 3 times [2024-06-14 12:58:28,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:28,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002133876] [2024-06-14 12:58:28,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:28,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:31,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:31,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:31,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002133876] [2024-06-14 12:58:31,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002133876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:31,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:31,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:58:31,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387358836] [2024-06-14 12:58:31,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:31,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:58:31,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:31,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:58:31,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:58:31,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:58:31,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 197 transitions, 2344 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2024-06-14 12:58:31,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:31,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:58:31,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:32,825 INFO L124 PetriNetUnfolderBase]: 3149/4859 cut-off events. [2024-06-14 12:58:32,825 INFO L125 PetriNetUnfolderBase]: For 216680/216689 co-relation queries the response was YES. [2024-06-14 12:58:32,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35198 conditions, 4859 events. 3149/4859 cut-off events. For 216680/216689 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 25977 event pairs, 755 based on Foata normal form. 12/4867 useless extension candidates. Maximal degree in co-relation 35122. Up to 4597 conditions per place. [2024-06-14 12:58:32,867 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 178 selfloop transitions, 50 changer transitions 0/231 dead transitions. [2024-06-14 12:58:32,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 231 transitions, 2965 flow [2024-06-14 12:58:32,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:58:32,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:58:32,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:58:32,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-14 12:58:32,872 INFO L175 Difference]: Start difference. First operand has 159 places, 197 transitions, 2344 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:58:32,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 231 transitions, 2965 flow [2024-06-14 12:58:33,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 231 transitions, 2844 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 12:58:33,102 INFO L231 Difference]: Finished difference. Result has 161 places, 199 transitions, 2405 flow [2024-06-14 12:58:33,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2223, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2405, PETRI_PLACES=161, PETRI_TRANSITIONS=199} [2024-06-14 12:58:33,102 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 117 predicate places. [2024-06-14 12:58:33,102 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 199 transitions, 2405 flow [2024-06-14 12:58:33,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2024-06-14 12:58:33,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:33,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:33,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 12:58:33,103 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:33,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:33,103 INFO L85 PathProgramCache]: Analyzing trace with hash 959594483, now seen corresponding path program 7 times [2024-06-14 12:58:33,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:33,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672565393] [2024-06-14 12:58:33,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:33,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:33,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:36,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:36,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672565393] [2024-06-14 12:58:36,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672565393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:36,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:36,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:58:36,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709181931] [2024-06-14 12:58:36,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:36,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:58:36,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:36,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:58:36,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:58:36,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:58:36,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 199 transitions, 2405 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2024-06-14 12:58:36,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:36,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:58:36,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:37,769 INFO L124 PetriNetUnfolderBase]: 3229/4995 cut-off events. [2024-06-14 12:58:37,770 INFO L125 PetriNetUnfolderBase]: For 247535/247544 co-relation queries the response was YES. [2024-06-14 12:58:37,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36313 conditions, 4995 events. 3229/4995 cut-off events. For 247535/247544 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 27006 event pairs, 749 based on Foata normal form. 32/5023 useless extension candidates. Maximal degree in co-relation 36236. Up to 4431 conditions per place. [2024-06-14 12:58:37,815 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 181 selfloop transitions, 61 changer transitions 0/245 dead transitions. [2024-06-14 12:58:37,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 245 transitions, 3133 flow [2024-06-14 12:58:37,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:58:37,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:58:37,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 12:58:37,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-14 12:58:37,818 INFO L175 Difference]: Start difference. First operand has 161 places, 199 transitions, 2405 flow. Second operand 9 states and 150 transitions. [2024-06-14 12:58:37,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 245 transitions, 3133 flow [2024-06-14 12:58:38,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 245 transitions, 2971 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 12:58:38,090 INFO L231 Difference]: Finished difference. Result has 164 places, 200 transitions, 2431 flow [2024-06-14 12:58:38,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2243, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2431, PETRI_PLACES=164, PETRI_TRANSITIONS=200} [2024-06-14 12:58:38,091 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-06-14 12:58:38,091 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 200 transitions, 2431 flow [2024-06-14 12:58:38,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2024-06-14 12:58:38,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:38,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:38,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 12:58:38,092 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:38,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:38,092 INFO L85 PathProgramCache]: Analyzing trace with hash 959450333, now seen corresponding path program 8 times [2024-06-14 12:58:38,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:38,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615166109] [2024-06-14 12:58:38,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:38,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:38,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:40,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:40,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:40,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615166109] [2024-06-14 12:58:40,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615166109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:40,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:40,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:58:40,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281464315] [2024-06-14 12:58:40,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:40,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:58:40,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:40,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:58:40,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:58:40,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:58:40,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 200 transitions, 2431 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2024-06-14 12:58:40,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:40,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:58:40,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:42,015 INFO L124 PetriNetUnfolderBase]: 3317/5143 cut-off events. [2024-06-14 12:58:42,015 INFO L125 PetriNetUnfolderBase]: For 261288/261297 co-relation queries the response was YES. [2024-06-14 12:58:42,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37602 conditions, 5143 events. 3317/5143 cut-off events. For 261288/261297 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 28120 event pairs, 767 based on Foata normal form. 28/5167 useless extension candidates. Maximal degree in co-relation 37524. Up to 4485 conditions per place. [2024-06-14 12:58:42,062 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 164 selfloop transitions, 78 changer transitions 0/245 dead transitions. [2024-06-14 12:58:42,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 245 transitions, 3144 flow [2024-06-14 12:58:42,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:58:42,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:58:42,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 12:58:42,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-14 12:58:42,064 INFO L175 Difference]: Start difference. First operand has 164 places, 200 transitions, 2431 flow. Second operand 9 states and 150 transitions. [2024-06-14 12:58:42,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 245 transitions, 3144 flow [2024-06-14 12:58:42,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 245 transitions, 3004 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 12:58:42,290 INFO L231 Difference]: Finished difference. Result has 166 places, 201 transitions, 2514 flow [2024-06-14 12:58:42,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2291, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2514, PETRI_PLACES=166, PETRI_TRANSITIONS=201} [2024-06-14 12:58:42,291 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-14 12:58:42,291 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 201 transitions, 2514 flow [2024-06-14 12:58:42,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2024-06-14 12:58:42,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:42,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:42,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 12:58:42,291 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:42,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:42,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1676577729, now seen corresponding path program 9 times [2024-06-14 12:58:42,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:42,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764704061] [2024-06-14 12:58:42,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:42,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:42,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:44,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:44,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:44,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764704061] [2024-06-14 12:58:44,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764704061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:44,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:44,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:58:44,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413194831] [2024-06-14 12:58:44,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:44,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:58:44,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:44,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:58:44,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:58:44,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:58:44,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 201 transitions, 2514 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2024-06-14 12:58:44,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:44,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:58:44,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:46,411 INFO L124 PetriNetUnfolderBase]: 3405/5291 cut-off events. [2024-06-14 12:58:46,411 INFO L125 PetriNetUnfolderBase]: For 275405/275414 co-relation queries the response was YES. [2024-06-14 12:58:46,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38869 conditions, 5291 events. 3405/5291 cut-off events. For 275405/275414 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 29220 event pairs, 813 based on Foata normal form. 28/5315 useless extension candidates. Maximal degree in co-relation 38790. Up to 4860 conditions per place. [2024-06-14 12:58:46,455 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 186 selfloop transitions, 55 changer transitions 0/244 dead transitions. [2024-06-14 12:58:46,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 244 transitions, 3215 flow [2024-06-14 12:58:46,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:58:46,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:58:46,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 12:58:46,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3850129198966408 [2024-06-14 12:58:46,457 INFO L175 Difference]: Start difference. First operand has 166 places, 201 transitions, 2514 flow. Second operand 9 states and 149 transitions. [2024-06-14 12:58:46,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 244 transitions, 3215 flow [2024-06-14 12:58:46,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 244 transitions, 3012 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-14 12:58:46,732 INFO L231 Difference]: Finished difference. Result has 167 places, 202 transitions, 2492 flow [2024-06-14 12:58:46,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2311, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2492, PETRI_PLACES=167, PETRI_TRANSITIONS=202} [2024-06-14 12:58:46,733 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 123 predicate places. [2024-06-14 12:58:46,733 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 202 transitions, 2492 flow [2024-06-14 12:58:46,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2024-06-14 12:58:46,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:46,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:46,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 12:58:46,734 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:46,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:46,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1682087979, now seen corresponding path program 10 times [2024-06-14 12:58:46,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:46,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437237930] [2024-06-14 12:58:46,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:46,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:46,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:49,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:49,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437237930] [2024-06-14 12:58:49,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437237930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:49,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:49,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:58:49,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400101787] [2024-06-14 12:58:49,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:49,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:58:49,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:49,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:58:49,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:58:49,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:58:49,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 202 transitions, 2492 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2024-06-14 12:58:49,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:49,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:58:49,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:50,843 INFO L124 PetriNetUnfolderBase]: 3465/5403 cut-off events. [2024-06-14 12:58:50,844 INFO L125 PetriNetUnfolderBase]: For 272924/272933 co-relation queries the response was YES. [2024-06-14 12:58:50,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38891 conditions, 5403 events. 3465/5403 cut-off events. For 272924/272933 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 30032 event pairs, 787 based on Foata normal form. 24/5423 useless extension candidates. Maximal degree in co-relation 38812. Up to 4115 conditions per place. [2024-06-14 12:58:50,886 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 165 selfloop transitions, 83 changer transitions 0/251 dead transitions. [2024-06-14 12:58:50,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 251 transitions, 3281 flow [2024-06-14 12:58:50,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:58:50,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:58:50,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 12:58:50,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-14 12:58:50,888 INFO L175 Difference]: Start difference. First operand has 167 places, 202 transitions, 2492 flow. Second operand 9 states and 152 transitions. [2024-06-14 12:58:50,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 251 transitions, 3281 flow [2024-06-14 12:58:51,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 251 transitions, 3140 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 12:58:51,136 INFO L231 Difference]: Finished difference. Result has 170 places, 204 transitions, 2646 flow [2024-06-14 12:58:51,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2351, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2646, PETRI_PLACES=170, PETRI_TRANSITIONS=204} [2024-06-14 12:58:51,139 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 126 predicate places. [2024-06-14 12:58:51,139 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 204 transitions, 2646 flow [2024-06-14 12:58:51,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2024-06-14 12:58:51,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:51,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:51,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 12:58:51,139 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)] === [2024-06-14 12:58:51,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:51,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1971064813, now seen corresponding path program 1 times [2024-06-14 12:58:51,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:51,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392183813] [2024-06-14 12:58:51,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:51,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:51,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:52,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:52,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:52,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392183813] [2024-06-14 12:58:52,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392183813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:52,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:52,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:58:52,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757422659] [2024-06-14 12:58:52,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:52,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:58:52,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:52,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:58:52,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:58:52,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:58:52,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 204 transitions, 2646 flow. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:52,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:52,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:58:52,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:54,003 INFO L124 PetriNetUnfolderBase]: 3470/5408 cut-off events. [2024-06-14 12:58:54,003 INFO L125 PetriNetUnfolderBase]: For 264303/264303 co-relation queries the response was YES. [2024-06-14 12:58:54,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39225 conditions, 5408 events. 3470/5408 cut-off events. For 264303/264303 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 30263 event pairs, 827 based on Foata normal form. 1/5407 useless extension candidates. Maximal degree in co-relation 39144. Up to 5349 conditions per place. [2024-06-14 12:58:54,053 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 211 selfloop transitions, 19 changer transitions 0/233 dead transitions. [2024-06-14 12:58:54,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 233 transitions, 3336 flow [2024-06-14 12:58:54,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:58:54,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:58:54,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-14 12:58:54,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-14 12:58:54,054 INFO L175 Difference]: Start difference. First operand has 170 places, 204 transitions, 2646 flow. Second operand 6 states and 98 transitions. [2024-06-14 12:58:54,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 233 transitions, 3336 flow [2024-06-14 12:58:54,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 233 transitions, 3139 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 12:58:54,374 INFO L231 Difference]: Finished difference. Result has 171 places, 213 transitions, 2594 flow [2024-06-14 12:58:54,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2449, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2594, PETRI_PLACES=171, PETRI_TRANSITIONS=213} [2024-06-14 12:58:54,374 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 127 predicate places. [2024-06-14 12:58:54,374 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 213 transitions, 2594 flow [2024-06-14 12:58:54,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:54,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:54,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:54,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 12:58:54,375 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:54,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:54,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1472053393, now seen corresponding path program 4 times [2024-06-14 12:58:54,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:54,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826841808] [2024-06-14 12:58:54,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:54,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:54,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:56,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:56,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826841808] [2024-06-14 12:58:56,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826841808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:56,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:56,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:58:56,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943429] [2024-06-14 12:58:56,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:56,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:58:56,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:56,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:58:56,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:58:56,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:58:56,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 213 transitions, 2594 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2024-06-14 12:58:56,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:56,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:58:56,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:58,489 INFO L124 PetriNetUnfolderBase]: 3490/5442 cut-off events. [2024-06-14 12:58:58,490 INFO L125 PetriNetUnfolderBase]: For 270026/270037 co-relation queries the response was YES. [2024-06-14 12:58:58,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39200 conditions, 5442 events. 3490/5442 cut-off events. For 270026/270037 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 30475 event pairs, 833 based on Foata normal form. 14/5452 useless extension candidates. Maximal degree in co-relation 39117. Up to 5187 conditions per place. [2024-06-14 12:58:58,537 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 203 selfloop transitions, 41 changer transitions 0/247 dead transitions. [2024-06-14 12:58:58,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 247 transitions, 3224 flow [2024-06-14 12:58:58,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:58:58,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:58:58,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:58:58,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-14 12:58:58,539 INFO L175 Difference]: Start difference. First operand has 171 places, 213 transitions, 2594 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:58:58,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 247 transitions, 3224 flow [2024-06-14 12:58:58,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 247 transitions, 3192 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-14 12:58:58,864 INFO L231 Difference]: Finished difference. Result has 178 places, 215 transitions, 2703 flow [2024-06-14 12:58:58,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2562, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2703, PETRI_PLACES=178, PETRI_TRANSITIONS=215} [2024-06-14 12:58:58,865 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 134 predicate places. [2024-06-14 12:58:58,865 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 215 transitions, 2703 flow [2024-06-14 12:58:58,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2024-06-14 12:58:58,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:58,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:58,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 12:58:58,866 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:58,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:58,866 INFO L85 PathProgramCache]: Analyzing trace with hash 375685999, now seen corresponding path program 5 times [2024-06-14 12:58:58,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:58,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498139310] [2024-06-14 12:58:58,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:58,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:58,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:01,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:01,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:01,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498139310] [2024-06-14 12:59:01,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498139310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:01,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:01,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:59:01,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992777857] [2024-06-14 12:59:01,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:01,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:59:01,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:01,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:59:01,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:59:01,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:59:01,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 215 transitions, 2703 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2024-06-14 12:59:01,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:01,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:59:01,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:03,118 INFO L124 PetriNetUnfolderBase]: 3482/5430 cut-off events. [2024-06-14 12:59:03,118 INFO L125 PetriNetUnfolderBase]: For 277584/277595 co-relation queries the response was YES. [2024-06-14 12:59:03,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39453 conditions, 5430 events. 3482/5430 cut-off events. For 277584/277595 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 30351 event pairs, 744 based on Foata normal form. 14/5440 useless extension candidates. Maximal degree in co-relation 39367. Up to 5103 conditions per place. [2024-06-14 12:59:03,165 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 205 selfloop transitions, 41 changer transitions 0/249 dead transitions. [2024-06-14 12:59:03,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 249 transitions, 3310 flow [2024-06-14 12:59:03,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:59:03,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:59:03,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 12:59:03,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 12:59:03,171 INFO L175 Difference]: Start difference. First operand has 178 places, 215 transitions, 2703 flow. Second operand 8 states and 129 transitions. [2024-06-14 12:59:03,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 249 transitions, 3310 flow [2024-06-14 12:59:03,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 249 transitions, 3193 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 12:59:03,512 INFO L231 Difference]: Finished difference. Result has 180 places, 216 transitions, 2698 flow [2024-06-14 12:59:03,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2586, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2698, PETRI_PLACES=180, PETRI_TRANSITIONS=216} [2024-06-14 12:59:03,513 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 136 predicate places. [2024-06-14 12:59:03,513 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 216 transitions, 2698 flow [2024-06-14 12:59:03,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2024-06-14 12:59:03,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:03,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:03,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 12:59:03,513 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)] === [2024-06-14 12:59:03,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:03,514 INFO L85 PathProgramCache]: Analyzing trace with hash -38033231, now seen corresponding path program 2 times [2024-06-14 12:59:03,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:03,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876073455] [2024-06-14 12:59:03,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:03,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:04,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:04,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:04,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876073455] [2024-06-14 12:59:04,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876073455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:04,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:04,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:59:04,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361534252] [2024-06-14 12:59:04,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:04,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:59:04,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:04,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:59:04,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:59:04,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:59:04,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 216 transitions, 2698 flow. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:04,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:04,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:59:04,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:06,158 INFO L124 PetriNetUnfolderBase]: 3489/5438 cut-off events. [2024-06-14 12:59:06,158 INFO L125 PetriNetUnfolderBase]: For 285307/285307 co-relation queries the response was YES. [2024-06-14 12:59:06,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39697 conditions, 5438 events. 3489/5438 cut-off events. For 285307/285307 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 30461 event pairs, 833 based on Foata normal form. 3/5439 useless extension candidates. Maximal degree in co-relation 39610. Up to 5371 conditions per place. [2024-06-14 12:59:06,212 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 215 selfloop transitions, 21 changer transitions 0/239 dead transitions. [2024-06-14 12:59:06,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 239 transitions, 3273 flow [2024-06-14 12:59:06,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:59:06,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:59:06,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-14 12:59:06,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-14 12:59:06,213 INFO L175 Difference]: Start difference. First operand has 180 places, 216 transitions, 2698 flow. Second operand 5 states and 91 transitions. [2024-06-14 12:59:06,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 239 transitions, 3273 flow [2024-06-14 12:59:06,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 239 transitions, 3138 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 12:59:06,614 INFO L231 Difference]: Finished difference. Result has 179 places, 219 transitions, 2669 flow [2024-06-14 12:59:06,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2563, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2669, PETRI_PLACES=179, PETRI_TRANSITIONS=219} [2024-06-14 12:59:06,614 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 135 predicate places. [2024-06-14 12:59:06,614 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 219 transitions, 2669 flow [2024-06-14 12:59:06,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:06,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:06,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:06,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 12:59:06,615 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)] === [2024-06-14 12:59:06,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:06,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1533590084, now seen corresponding path program 1 times [2024-06-14 12:59:06,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:06,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767191223] [2024-06-14 12:59:06,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:06,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:06,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:08,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:08,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767191223] [2024-06-14 12:59:08,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767191223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:08,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:08,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:59:08,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899942954] [2024-06-14 12:59:08,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:08,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:59:08,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:08,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:59:08,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:59:08,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:59:08,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 219 transitions, 2669 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:08,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:08,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:59:08,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:09,649 INFO L124 PetriNetUnfolderBase]: 3486/5434 cut-off events. [2024-06-14 12:59:09,650 INFO L125 PetriNetUnfolderBase]: For 289165/289165 co-relation queries the response was YES. [2024-06-14 12:59:09,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39850 conditions, 5434 events. 3486/5434 cut-off events. For 289165/289165 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 30479 event pairs, 832 based on Foata normal form. 1/5433 useless extension candidates. Maximal degree in co-relation 39762. Up to 5340 conditions per place. [2024-06-14 12:59:09,796 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 225 selfloop transitions, 26 changer transitions 0/254 dead transitions. [2024-06-14 12:59:09,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 254 transitions, 3436 flow [2024-06-14 12:59:09,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:59:09,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:59:09,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 12:59:09,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-14 12:59:09,798 INFO L175 Difference]: Start difference. First operand has 179 places, 219 transitions, 2669 flow. Second operand 7 states and 117 transitions. [2024-06-14 12:59:09,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 254 transitions, 3436 flow [2024-06-14 12:59:10,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 254 transitions, 3391 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 12:59:10,060 INFO L231 Difference]: Finished difference. Result has 184 places, 225 transitions, 2789 flow [2024-06-14 12:59:10,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2624, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2789, PETRI_PLACES=184, PETRI_TRANSITIONS=225} [2024-06-14 12:59:10,061 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-14 12:59:10,061 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 225 transitions, 2789 flow [2024-06-14 12:59:10,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:10,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:10,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:10,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 12:59:10,062 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:59:10,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:10,062 INFO L85 PathProgramCache]: Analyzing trace with hash 2082830525, now seen corresponding path program 1 times [2024-06-14 12:59:10,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:10,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007111940] [2024-06-14 12:59:10,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:10,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:10,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:13,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:13,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:13,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007111940] [2024-06-14 12:59:13,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007111940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:13,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:13,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:59:13,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76198975] [2024-06-14 12:59:13,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:13,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:59:13,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:13,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:59:13,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:59:13,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:59:13,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 225 transitions, 2789 flow. Second operand has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:13,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:13,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:59:13,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:15,275 INFO L124 PetriNetUnfolderBase]: 3534/5520 cut-off events. [2024-06-14 12:59:15,276 INFO L125 PetriNetUnfolderBase]: For 316786/316801 co-relation queries the response was YES. [2024-06-14 12:59:15,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41136 conditions, 5520 events. 3534/5520 cut-off events. For 316786/316801 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 31067 event pairs, 775 based on Foata normal form. 26/5542 useless extension candidates. Maximal degree in co-relation 41046. Up to 5163 conditions per place. [2024-06-14 12:59:15,325 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 217 selfloop transitions, 46 changer transitions 0/266 dead transitions. [2024-06-14 12:59:15,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 266 transitions, 3505 flow [2024-06-14 12:59:15,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:59:15,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:59:15,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 12:59:15,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772609819121447 [2024-06-14 12:59:15,327 INFO L175 Difference]: Start difference. First operand has 184 places, 225 transitions, 2789 flow. Second operand 9 states and 146 transitions. [2024-06-14 12:59:15,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 266 transitions, 3505 flow [2024-06-14 12:59:15,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 266 transitions, 3431 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 12:59:15,738 INFO L231 Difference]: Finished difference. Result has 189 places, 226 transitions, 2879 flow [2024-06-14 12:59:15,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2715, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2879, PETRI_PLACES=189, PETRI_TRANSITIONS=226} [2024-06-14 12:59:15,739 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 145 predicate places. [2024-06-14 12:59:15,739 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 226 transitions, 2879 flow [2024-06-14 12:59:15,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:15,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:15,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:15,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 12:59:15,740 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:59:15,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:15,740 INFO L85 PathProgramCache]: Analyzing trace with hash -427859477, now seen corresponding path program 2 times [2024-06-14 12:59:15,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:15,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320238928] [2024-06-14 12:59:15,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:15,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:15,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:18,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:18,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:18,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320238928] [2024-06-14 12:59:18,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320238928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:18,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:18,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:59:18,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861478329] [2024-06-14 12:59:18,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:18,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:59:18,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:18,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:59:18,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:59:18,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:59:18,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 226 transitions, 2879 flow. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:18,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:18,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:59:18,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:20,692 INFO L124 PetriNetUnfolderBase]: 3582/5604 cut-off events. [2024-06-14 12:59:20,692 INFO L125 PetriNetUnfolderBase]: For 334326/334341 co-relation queries the response was YES. [2024-06-14 12:59:20,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42180 conditions, 5604 events. 3582/5604 cut-off events. For 334326/334341 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 31793 event pairs, 872 based on Foata normal form. 26/5626 useless extension candidates. Maximal degree in co-relation 42089. Up to 5258 conditions per place. [2024-06-14 12:59:20,743 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 213 selfloop transitions, 51 changer transitions 0/267 dead transitions. [2024-06-14 12:59:20,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 267 transitions, 3602 flow [2024-06-14 12:59:20,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:59:20,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:59:20,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 12:59:20,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772609819121447 [2024-06-14 12:59:20,759 INFO L175 Difference]: Start difference. First operand has 189 places, 226 transitions, 2879 flow. Second operand 9 states and 146 transitions. [2024-06-14 12:59:20,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 267 transitions, 3602 flow [2024-06-14 12:59:21,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 267 transitions, 3464 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-14 12:59:21,215 INFO L231 Difference]: Finished difference. Result has 191 places, 227 transitions, 2917 flow [2024-06-14 12:59:21,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2741, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2917, PETRI_PLACES=191, PETRI_TRANSITIONS=227} [2024-06-14 12:59:21,216 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 147 predicate places. [2024-06-14 12:59:21,216 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 227 transitions, 2917 flow [2024-06-14 12:59:21,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:21,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:21,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:21,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 12:59:21,222 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)] === [2024-06-14 12:59:21,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:21,222 INFO L85 PathProgramCache]: Analyzing trace with hash -973465412, now seen corresponding path program 2 times [2024-06-14 12:59:21,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:21,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81966071] [2024-06-14 12:59:21,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:21,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:22,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:22,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:22,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81966071] [2024-06-14 12:59:22,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81966071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:22,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:22,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:59:22,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111307654] [2024-06-14 12:59:22,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:22,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:59:22,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:22,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:59:22,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:59:22,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:59:22,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 227 transitions, 2917 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:22,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:22,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:59:22,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:24,372 INFO L124 PetriNetUnfolderBase]: 3587/5609 cut-off events. [2024-06-14 12:59:24,373 INFO L125 PetriNetUnfolderBase]: For 328069/328069 co-relation queries the response was YES. [2024-06-14 12:59:24,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42211 conditions, 5609 events. 3587/5609 cut-off events. For 328069/328069 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 31837 event pairs, 868 based on Foata normal form. 1/5608 useless extension candidates. Maximal degree in co-relation 42119. Up to 5548 conditions per place. [2024-06-14 12:59:24,437 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 225 selfloop transitions, 22 changer transitions 0/250 dead transitions. [2024-06-14 12:59:24,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 250 transitions, 3518 flow [2024-06-14 12:59:24,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:59:24,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:59:24,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-14 12:59:24,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3554817275747508 [2024-06-14 12:59:24,439 INFO L175 Difference]: Start difference. First operand has 191 places, 227 transitions, 2917 flow. Second operand 7 states and 107 transitions. [2024-06-14 12:59:24,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 250 transitions, 3518 flow [2024-06-14 12:59:24,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 250 transitions, 3368 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 12:59:24,887 INFO L231 Difference]: Finished difference. Result has 191 places, 230 transitions, 2872 flow [2024-06-14 12:59:24,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2767, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2872, PETRI_PLACES=191, PETRI_TRANSITIONS=230} [2024-06-14 12:59:24,888 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 147 predicate places. [2024-06-14 12:59:24,888 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 230 transitions, 2872 flow [2024-06-14 12:59:24,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:24,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:24,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:24,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 12:59:24,888 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)] === [2024-06-14 12:59:24,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:24,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1533291182, now seen corresponding path program 1 times [2024-06-14 12:59:24,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:24,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110273006] [2024-06-14 12:59:24,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:24,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:24,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:26,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:26,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:26,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110273006] [2024-06-14 12:59:26,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110273006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:26,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:26,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:59:26,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551287550] [2024-06-14 12:59:26,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:26,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:59:26,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:26,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:59:26,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:59:26,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:59:26,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 230 transitions, 2872 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:26,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:26,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:59:26,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:28,172 INFO L124 PetriNetUnfolderBase]: 3597/5623 cut-off events. [2024-06-14 12:59:28,172 INFO L125 PetriNetUnfolderBase]: For 332255/332255 co-relation queries the response was YES. [2024-06-14 12:59:28,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42069 conditions, 5623 events. 3597/5623 cut-off events. For 332255/332255 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 31921 event pairs, 865 based on Foata normal form. 2/5623 useless extension candidates. Maximal degree in co-relation 41976. Up to 5536 conditions per place. [2024-06-14 12:59:28,223 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 228 selfloop transitions, 29 changer transitions 0/260 dead transitions. [2024-06-14 12:59:28,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 260 transitions, 3660 flow [2024-06-14 12:59:28,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:59:28,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:59:28,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-14 12:59:28,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3754152823920266 [2024-06-14 12:59:28,225 INFO L175 Difference]: Start difference. First operand has 191 places, 230 transitions, 2872 flow. Second operand 7 states and 113 transitions. [2024-06-14 12:59:28,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 260 transitions, 3660 flow [2024-06-14 12:59:28,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 260 transitions, 3592 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 12:59:28,678 INFO L231 Difference]: Finished difference. Result has 193 places, 236 transitions, 2972 flow [2024-06-14 12:59:28,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2804, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2972, PETRI_PLACES=193, PETRI_TRANSITIONS=236} [2024-06-14 12:59:28,679 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 149 predicate places. [2024-06-14 12:59:28,679 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 236 transitions, 2972 flow [2024-06-14 12:59:28,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:28,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:28,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:28,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 12:59:28,680 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:59:28,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:28,680 INFO L85 PathProgramCache]: Analyzing trace with hash 606001051, now seen corresponding path program 3 times [2024-06-14 12:59:28,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:28,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034478563] [2024-06-14 12:59:28,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:28,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:28,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:31,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:31,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:31,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034478563] [2024-06-14 12:59:31,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034478563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:31,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:31,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:59:31,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528553431] [2024-06-14 12:59:31,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:31,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:59:31,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:31,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:59:31,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:59:31,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:59:31,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 236 transitions, 2972 flow. Second operand has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:31,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:31,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:59:31,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:33,241 INFO L124 PetriNetUnfolderBase]: 3645/5709 cut-off events. [2024-06-14 12:59:33,242 INFO L125 PetriNetUnfolderBase]: For 362326/362343 co-relation queries the response was YES. [2024-06-14 12:59:33,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43214 conditions, 5709 events. 3645/5709 cut-off events. For 362326/362343 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 32528 event pairs, 760 based on Foata normal form. 28/5733 useless extension candidates. Maximal degree in co-relation 43120. Up to 5298 conditions per place. [2024-06-14 12:59:33,294 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 237 selfloop transitions, 44 changer transitions 0/284 dead transitions. [2024-06-14 12:59:33,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 284 transitions, 3750 flow [2024-06-14 12:59:33,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:59:33,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:59:33,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-14 12:59:33,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3674418604651163 [2024-06-14 12:59:33,296 INFO L175 Difference]: Start difference. First operand has 193 places, 236 transitions, 2972 flow. Second operand 10 states and 158 transitions. [2024-06-14 12:59:33,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 284 transitions, 3750 flow [2024-06-14 12:59:33,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 284 transitions, 3699 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-14 12:59:33,784 INFO L231 Difference]: Finished difference. Result has 200 places, 237 transitions, 3085 flow [2024-06-14 12:59:33,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2921, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3085, PETRI_PLACES=200, PETRI_TRANSITIONS=237} [2024-06-14 12:59:33,785 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-14 12:59:33,785 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 237 transitions, 3085 flow [2024-06-14 12:59:33,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:33,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:33,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:33,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 12:59:33,785 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:59:33,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:33,786 INFO L85 PathProgramCache]: Analyzing trace with hash 320901181, now seen corresponding path program 4 times [2024-06-14 12:59:33,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:33,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166234933] [2024-06-14 12:59:33,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:33,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:33,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:36,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:36,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:36,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166234933] [2024-06-14 12:59:36,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166234933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:36,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:36,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:59:36,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164714483] [2024-06-14 12:59:36,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:36,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:59:36,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:36,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:59:36,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:59:36,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:59:36,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 237 transitions, 3085 flow. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:36,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:36,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:59:36,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:38,053 INFO L124 PetriNetUnfolderBase]: 3625/5677 cut-off events. [2024-06-14 12:59:38,054 INFO L125 PetriNetUnfolderBase]: For 360634/360651 co-relation queries the response was YES. [2024-06-14 12:59:38,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42740 conditions, 5677 events. 3625/5677 cut-off events. For 360634/360651 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 32360 event pairs, 851 based on Foata normal form. 28/5701 useless extension candidates. Maximal degree in co-relation 42644. Up to 5338 conditions per place. [2024-06-14 12:59:38,111 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 231 selfloop transitions, 42 changer transitions 0/276 dead transitions. [2024-06-14 12:59:38,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 276 transitions, 3659 flow [2024-06-14 12:59:38,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:59:38,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:59:38,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 12:59:38,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 12:59:38,113 INFO L175 Difference]: Start difference. First operand has 200 places, 237 transitions, 3085 flow. Second operand 9 states and 144 transitions. [2024-06-14 12:59:38,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 276 transitions, 3659 flow [2024-06-14 12:59:38,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 276 transitions, 3520 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-14 12:59:38,637 INFO L231 Difference]: Finished difference. Result has 201 places, 236 transitions, 2934 flow [2024-06-14 12:59:38,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2846, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2934, PETRI_PLACES=201, PETRI_TRANSITIONS=236} [2024-06-14 12:59:38,638 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 157 predicate places. [2024-06-14 12:59:38,638 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 236 transitions, 2934 flow [2024-06-14 12:59:38,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:38,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:38,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:38,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 12:59:38,638 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)] === [2024-06-14 12:59:38,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:38,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1394621846, now seen corresponding path program 3 times [2024-06-14 12:59:38,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:38,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366264876] [2024-06-14 12:59:38,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:38,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:40,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:40,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:40,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366264876] [2024-06-14 12:59:40,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366264876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:40,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:40,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:59:40,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021337955] [2024-06-14 12:59:40,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:40,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:59:40,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:40,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:59:40,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:59:40,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:59:40,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 236 transitions, 2934 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:40,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:40,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:59:40,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:41,671 INFO L124 PetriNetUnfolderBase]: 3632/5685 cut-off events. [2024-06-14 12:59:41,671 INFO L125 PetriNetUnfolderBase]: For 353569/353569 co-relation queries the response was YES. [2024-06-14 12:59:41,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42640 conditions, 5685 events. 3632/5685 cut-off events. For 353569/353569 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 32368 event pairs, 868 based on Foata normal form. 3/5686 useless extension candidates. Maximal degree in co-relation 42543. Up to 5590 conditions per place. [2024-06-14 12:59:41,732 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 240 selfloop transitions, 32 changer transitions 0/275 dead transitions. [2024-06-14 12:59:41,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 275 transitions, 3716 flow [2024-06-14 12:59:41,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:59:41,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:59:41,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-14 12:59:41,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42248062015503873 [2024-06-14 12:59:41,733 INFO L175 Difference]: Start difference. First operand has 201 places, 236 transitions, 2934 flow. Second operand 6 states and 109 transitions. [2024-06-14 12:59:41,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 275 transitions, 3716 flow [2024-06-14 12:59:42,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 275 transitions, 3540 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-14 12:59:42,243 INFO L231 Difference]: Finished difference. Result has 201 places, 247 transitions, 3035 flow [2024-06-14 12:59:42,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2758, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3035, PETRI_PLACES=201, PETRI_TRANSITIONS=247} [2024-06-14 12:59:42,244 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 157 predicate places. [2024-06-14 12:59:42,244 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 247 transitions, 3035 flow [2024-06-14 12:59:42,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:42,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:42,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:42,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 12:59:42,244 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)] === [2024-06-14 12:59:42,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:42,245 INFO L85 PathProgramCache]: Analyzing trace with hash -2096881808, now seen corresponding path program 2 times [2024-06-14 12:59:42,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:42,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16951040] [2024-06-14 12:59:42,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:42,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:42,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:43,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:43,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:43,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16951040] [2024-06-14 12:59:43,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16951040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:43,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:43,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:59:43,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714019254] [2024-06-14 12:59:43,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:43,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:59:43,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:43,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:59:43,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:59:43,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:59:43,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 247 transitions, 3035 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:43,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:43,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:59:43,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:45,366 INFO L124 PetriNetUnfolderBase]: 3626/5677 cut-off events. [2024-06-14 12:59:45,366 INFO L125 PetriNetUnfolderBase]: For 354147/354147 co-relation queries the response was YES. [2024-06-14 12:59:45,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42714 conditions, 5677 events. 3626/5677 cut-off events. For 354147/354147 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 32343 event pairs, 868 based on Foata normal form. 2/5677 useless extension candidates. Maximal degree in co-relation 42615. Up to 5604 conditions per place. [2024-06-14 12:59:45,418 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 236 selfloop transitions, 28 changer transitions 0/267 dead transitions. [2024-06-14 12:59:45,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 267 transitions, 3625 flow [2024-06-14 12:59:45,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:59:45,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:59:45,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-14 12:59:45,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39147286821705424 [2024-06-14 12:59:45,421 INFO L175 Difference]: Start difference. First operand has 201 places, 247 transitions, 3035 flow. Second operand 6 states and 101 transitions. [2024-06-14 12:59:45,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 267 transitions, 3625 flow [2024-06-14 12:59:45,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 267 transitions, 3529 flow, removed 47 selfloop flow, removed 1 redundant places. [2024-06-14 12:59:45,846 INFO L231 Difference]: Finished difference. Result has 206 places, 247 transitions, 3001 flow [2024-06-14 12:59:45,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2939, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3001, PETRI_PLACES=206, PETRI_TRANSITIONS=247} [2024-06-14 12:59:45,847 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 162 predicate places. [2024-06-14 12:59:45,847 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 247 transitions, 3001 flow [2024-06-14 12:59:45,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:45,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:45,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:45,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 12:59:45,848 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)] === [2024-06-14 12:59:45,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:45,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1356095306, now seen corresponding path program 1 times [2024-06-14 12:59:45,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:45,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479315013] [2024-06-14 12:59:45,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:45,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:45,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:47,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:47,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:47,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479315013] [2024-06-14 12:59:47,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479315013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:47,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:47,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:59:47,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997133202] [2024-06-14 12:59:47,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:47,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:59:47,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:47,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:59:47,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:59:47,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:59:47,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 247 transitions, 3001 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:47,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:47,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:59:47,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:49,823 INFO L124 PetriNetUnfolderBase]: 3662/5729 cut-off events. [2024-06-14 12:59:49,823 INFO L125 PetriNetUnfolderBase]: For 373620/373641 co-relation queries the response was YES. [2024-06-14 12:59:49,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43347 conditions, 5729 events. 3662/5729 cut-off events. For 373620/373641 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 32607 event pairs, 870 based on Foata normal form. 24/5749 useless extension candidates. Maximal degree in co-relation 43245. Up to 5434 conditions per place. [2024-06-14 12:59:49,871 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 234 selfloop transitions, 50 changer transitions 0/287 dead transitions. [2024-06-14 12:59:49,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 287 transitions, 4082 flow [2024-06-14 12:59:49,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:59:49,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:59:49,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 12:59:49,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-14 12:59:49,872 INFO L175 Difference]: Start difference. First operand has 206 places, 247 transitions, 3001 flow. Second operand 7 states and 117 transitions. [2024-06-14 12:59:49,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 287 transitions, 4082 flow [2024-06-14 12:59:50,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 287 transitions, 3990 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 12:59:50,406 INFO L231 Difference]: Finished difference. Result has 209 places, 260 transitions, 3254 flow [2024-06-14 12:59:50,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2909, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3254, PETRI_PLACES=209, PETRI_TRANSITIONS=260} [2024-06-14 12:59:50,407 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 165 predicate places. [2024-06-14 12:59:50,407 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 260 transitions, 3254 flow [2024-06-14 12:59:50,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:50,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:50,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:50,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 12:59:50,408 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)] === [2024-06-14 12:59:50,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:50,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1355975336, now seen corresponding path program 2 times [2024-06-14 12:59:50,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:50,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89633681] [2024-06-14 12:59:50,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:50,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:50,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:52,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:52,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:52,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89633681] [2024-06-14 12:59:52,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89633681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:52,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:52,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:59:52,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48732653] [2024-06-14 12:59:52,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:52,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:59:52,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:52,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:59:52,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:59:52,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:59:52,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 260 transitions, 3254 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:52,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:52,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:59:52,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:54,154 INFO L124 PetriNetUnfolderBase]: 3821/5950 cut-off events. [2024-06-14 12:59:54,154 INFO L125 PetriNetUnfolderBase]: For 418250/418250 co-relation queries the response was YES. [2024-06-14 12:59:54,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46489 conditions, 5950 events. 3821/5950 cut-off events. For 418250/418250 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 33940 event pairs, 869 based on Foata normal form. 12/5960 useless extension candidates. Maximal degree in co-relation 46385. Up to 5780 conditions per place. [2024-06-14 12:59:54,219 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 265 selfloop transitions, 38 changer transitions 0/306 dead transitions. [2024-06-14 12:59:54,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 306 transitions, 4414 flow [2024-06-14 12:59:54,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:59:54,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:59:54,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 12:59:54,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-14 12:59:54,220 INFO L175 Difference]: Start difference. First operand has 209 places, 260 transitions, 3254 flow. Second operand 8 states and 127 transitions. [2024-06-14 12:59:54,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 306 transitions, 4414 flow [2024-06-14 12:59:54,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 306 transitions, 4310 flow, removed 44 selfloop flow, removed 2 redundant places. [2024-06-14 12:59:54,950 INFO L231 Difference]: Finished difference. Result has 216 places, 280 transitions, 3613 flow [2024-06-14 12:59:54,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3174, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3613, PETRI_PLACES=216, PETRI_TRANSITIONS=280} [2024-06-14 12:59:54,955 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-14 12:59:54,955 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 280 transitions, 3613 flow [2024-06-14 12:59:54,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:54,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:54,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:54,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 12:59:54,955 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)] === [2024-06-14 12:59:54,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:54,956 INFO L85 PathProgramCache]: Analyzing trace with hash 151680298, now seen corresponding path program 3 times [2024-06-14 12:59:54,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:54,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507365025] [2024-06-14 12:59:54,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:54,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:54,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:57,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:57,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:57,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507365025] [2024-06-14 12:59:57,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507365025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:57,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:57,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:59:57,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939740874] [2024-06-14 12:59:57,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:57,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:59:57,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:57,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:59:57,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:59:57,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:59:57,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 280 transitions, 3613 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:57,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:57,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:59:57,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:59,024 INFO L124 PetriNetUnfolderBase]: 3949/6128 cut-off events. [2024-06-14 12:59:59,024 INFO L125 PetriNetUnfolderBase]: For 448117/448117 co-relation queries the response was YES. [2024-06-14 12:59:59,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49198 conditions, 6128 events. 3949/6128 cut-off events. For 448117/448117 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 34970 event pairs, 864 based on Foata normal form. 12/6138 useless extension candidates. Maximal degree in co-relation 49091. Up to 5669 conditions per place. [2024-06-14 12:59:59,092 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 237 selfloop transitions, 95 changer transitions 0/335 dead transitions. [2024-06-14 12:59:59,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 335 transitions, 4838 flow [2024-06-14 12:59:59,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:59:59,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:59:59,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:59:59,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-14 12:59:59,094 INFO L175 Difference]: Start difference. First operand has 216 places, 280 transitions, 3613 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:59:59,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 335 transitions, 4838 flow [2024-06-14 12:59:59,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 335 transitions, 4692 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-06-14 12:59:59,828 INFO L231 Difference]: Finished difference. Result has 222 places, 295 transitions, 4075 flow [2024-06-14 12:59:59,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3467, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4075, PETRI_PLACES=222, PETRI_TRANSITIONS=295} [2024-06-14 12:59:59,828 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 178 predicate places. [2024-06-14 12:59:59,828 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 295 transitions, 4075 flow [2024-06-14 12:59:59,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:59,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:59,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:59,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 12:59:59,829 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)] === [2024-06-14 12:59:59,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:59,829 INFO L85 PathProgramCache]: Analyzing trace with hash -2096451218, now seen corresponding path program 1 times [2024-06-14 12:59:59,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:59,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479133004] [2024-06-14 12:59:59,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:59,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:01,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:01,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:01,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479133004] [2024-06-14 13:00:01,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479133004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:01,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:01,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:00:01,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464487081] [2024-06-14 13:00:01,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:01,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:00:01,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:01,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:00:01,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:00:02,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:00:02,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 295 transitions, 4075 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:02,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:02,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:00:02,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:03,575 INFO L124 PetriNetUnfolderBase]: 3944/6121 cut-off events. [2024-06-14 13:00:03,576 INFO L125 PetriNetUnfolderBase]: For 448202/448202 co-relation queries the response was YES. [2024-06-14 13:00:03,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50250 conditions, 6121 events. 3944/6121 cut-off events. For 448202/448202 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 34873 event pairs, 920 based on Foata normal form. 2/6121 useless extension candidates. Maximal degree in co-relation 50140. Up to 6085 conditions per place. [2024-06-14 13:00:03,642 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 292 selfloop transitions, 13 changer transitions 0/308 dead transitions. [2024-06-14 13:00:03,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 308 transitions, 4755 flow [2024-06-14 13:00:03,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:00:03,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:00:03,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2024-06-14 13:00:03,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3674418604651163 [2024-06-14 13:00:03,644 INFO L175 Difference]: Start difference. First operand has 222 places, 295 transitions, 4075 flow. Second operand 5 states and 79 transitions. [2024-06-14 13:00:03,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 308 transitions, 4755 flow [2024-06-14 13:00:04,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 308 transitions, 4599 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-14 13:00:04,262 INFO L231 Difference]: Finished difference. Result has 223 places, 297 transitions, 3994 flow [2024-06-14 13:00:04,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3923, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3994, PETRI_PLACES=223, PETRI_TRANSITIONS=297} [2024-06-14 13:00:04,263 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 179 predicate places. [2024-06-14 13:00:04,263 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 297 transitions, 3994 flow [2024-06-14 13:00:04,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:04,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:04,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:04,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 13:00:04,264 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)] === [2024-06-14 13:00:04,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:04,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1516849388, now seen corresponding path program 1 times [2024-06-14 13:00:04,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:04,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76250140] [2024-06-14 13:00:04,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:04,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:06,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:06,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:06,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76250140] [2024-06-14 13:00:06,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76250140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:06,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:06,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:00:06,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821730025] [2024-06-14 13:00:06,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:06,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:00:06,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:06,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:00:06,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:00:06,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:00:06,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 297 transitions, 3994 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:06,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:06,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:00:06,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:08,011 INFO L124 PetriNetUnfolderBase]: 3949/6128 cut-off events. [2024-06-14 13:00:08,011 INFO L125 PetriNetUnfolderBase]: For 427039/427039 co-relation queries the response was YES. [2024-06-14 13:00:08,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49256 conditions, 6128 events. 3949/6128 cut-off events. For 427039/427039 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 34938 event pairs, 913 based on Foata normal form. 1/6127 useless extension candidates. Maximal degree in co-relation 49144. Up to 6004 conditions per place. [2024-06-14 13:00:08,074 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 301 selfloop transitions, 37 changer transitions 0/341 dead transitions. [2024-06-14 13:00:08,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 341 transitions, 5002 flow [2024-06-14 13:00:08,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:00:08,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:00:08,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 13:00:08,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-14 13:00:08,076 INFO L175 Difference]: Start difference. First operand has 223 places, 297 transitions, 3994 flow. Second operand 8 states and 135 transitions. [2024-06-14 13:00:08,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 341 transitions, 5002 flow [2024-06-14 13:00:08,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 341 transitions, 4945 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-14 13:00:08,686 INFO L231 Difference]: Finished difference. Result has 228 places, 303 transitions, 4127 flow [2024-06-14 13:00:08,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3937, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4127, PETRI_PLACES=228, PETRI_TRANSITIONS=303} [2024-06-14 13:00:08,688 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 184 predicate places. [2024-06-14 13:00:08,688 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 303 transitions, 4127 flow [2024-06-14 13:00:08,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:08,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:08,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:08,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 13:00:08,689 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)] === [2024-06-14 13:00:08,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:08,689 INFO L85 PathProgramCache]: Analyzing trace with hash -296650329, now seen corresponding path program 1 times [2024-06-14 13:00:08,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:08,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068180752] [2024-06-14 13:00:08,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:08,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:08,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:10,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:10,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:10,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068180752] [2024-06-14 13:00:10,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068180752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:10,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:10,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:00:10,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303210762] [2024-06-14 13:00:10,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:10,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:00:10,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:10,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:00:10,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:00:10,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:00:10,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 303 transitions, 4127 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:10,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:10,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:00:10,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:12,135 INFO L124 PetriNetUnfolderBase]: 3959/6142 cut-off events. [2024-06-14 13:00:12,135 INFO L125 PetriNetUnfolderBase]: For 444176/444176 co-relation queries the response was YES. [2024-06-14 13:00:12,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50032 conditions, 6142 events. 3959/6142 cut-off events. For 444176/444176 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 35036 event pairs, 932 based on Foata normal form. 2/6142 useless extension candidates. Maximal degree in co-relation 49919. Up to 6004 conditions per place. [2024-06-14 13:00:12,208 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 298 selfloop transitions, 48 changer transitions 0/349 dead transitions. [2024-06-14 13:00:12,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 349 transitions, 5256 flow [2024-06-14 13:00:12,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:00:12,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:00:12,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 13:00:12,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-14 13:00:12,209 INFO L175 Difference]: Start difference. First operand has 228 places, 303 transitions, 4127 flow. Second operand 8 states and 131 transitions. [2024-06-14 13:00:12,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 349 transitions, 5256 flow [2024-06-14 13:00:12,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 349 transitions, 5163 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-14 13:00:12,964 INFO L231 Difference]: Finished difference. Result has 234 places, 316 transitions, 4413 flow [2024-06-14 13:00:12,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4034, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4413, PETRI_PLACES=234, PETRI_TRANSITIONS=316} [2024-06-14 13:00:12,976 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 190 predicate places. [2024-06-14 13:00:12,977 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 316 transitions, 4413 flow [2024-06-14 13:00:12,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:12,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:12,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:12,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 13:00:12,977 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)] === [2024-06-14 13:00:12,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:12,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1517118158, now seen corresponding path program 2 times [2024-06-14 13:00:12,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:12,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093295380] [2024-06-14 13:00:12,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:12,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:15,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:15,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:15,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093295380] [2024-06-14 13:00:15,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093295380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:15,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:15,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:00:15,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734815141] [2024-06-14 13:00:15,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:15,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:00:15,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:15,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:00:15,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:00:15,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:00:15,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 316 transitions, 4413 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:15,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:15,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:00:15,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:16,881 INFO L124 PetriNetUnfolderBase]: 3964/6149 cut-off events. [2024-06-14 13:00:16,881 INFO L125 PetriNetUnfolderBase]: For 458447/458447 co-relation queries the response was YES. [2024-06-14 13:00:16,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50984 conditions, 6149 events. 3964/6149 cut-off events. For 458447/458447 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 35056 event pairs, 912 based on Foata normal form. 1/6148 useless extension candidates. Maximal degree in co-relation 50867. Up to 6052 conditions per place. [2024-06-14 13:00:16,957 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 313 selfloop transitions, 32 changer transitions 0/348 dead transitions. [2024-06-14 13:00:16,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 348 transitions, 5233 flow [2024-06-14 13:00:16,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:00:16,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:00:16,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 13:00:16,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3633720930232558 [2024-06-14 13:00:16,959 INFO L175 Difference]: Start difference. First operand has 234 places, 316 transitions, 4413 flow. Second operand 8 states and 125 transitions. [2024-06-14 13:00:16,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 348 transitions, 5233 flow [2024-06-14 13:00:17,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 348 transitions, 5151 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-14 13:00:17,660 INFO L231 Difference]: Finished difference. Result has 239 places, 319 transitions, 4453 flow [2024-06-14 13:00:17,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4331, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4453, PETRI_PLACES=239, PETRI_TRANSITIONS=319} [2024-06-14 13:00:17,661 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 195 predicate places. [2024-06-14 13:00:17,661 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 319 transitions, 4453 flow [2024-06-14 13:00:17,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:17,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:17,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:17,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 13:00:17,662 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)] === [2024-06-14 13:00:17,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:17,662 INFO L85 PathProgramCache]: Analyzing trace with hash -293106192, now seen corresponding path program 1 times [2024-06-14 13:00:17,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:17,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379340714] [2024-06-14 13:00:17,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:17,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:19,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:19,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:19,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379340714] [2024-06-14 13:00:19,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379340714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:19,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:19,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:00:19,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854948779] [2024-06-14 13:00:19,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:19,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:00:19,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:19,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:00:19,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:00:19,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:00:19,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 319 transitions, 4453 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:19,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:19,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:00:19,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:21,759 INFO L124 PetriNetUnfolderBase]: 3985/6182 cut-off events. [2024-06-14 13:00:21,760 INFO L125 PetriNetUnfolderBase]: For 475664/475670 co-relation queries the response was YES. [2024-06-14 13:00:21,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51626 conditions, 6182 events. 3985/6182 cut-off events. For 475664/475670 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 35354 event pairs, 945 based on Foata normal form. 5/6180 useless extension candidates. Maximal degree in co-relation 51507. Up to 5830 conditions per place. [2024-06-14 13:00:21,830 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 280 selfloop transitions, 77 changer transitions 0/360 dead transitions. [2024-06-14 13:00:21,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 360 transitions, 5845 flow [2024-06-14 13:00:21,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:00:21,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:00:21,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 13:00:21,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-14 13:00:21,831 INFO L175 Difference]: Start difference. First operand has 239 places, 319 transitions, 4453 flow. Second operand 7 states and 121 transitions. [2024-06-14 13:00:21,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 360 transitions, 5845 flow [2024-06-14 13:00:22,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 360 transitions, 5743 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 13:00:22,824 INFO L231 Difference]: Finished difference. Result has 241 places, 331 transitions, 4774 flow [2024-06-14 13:00:22,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4351, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4774, PETRI_PLACES=241, PETRI_TRANSITIONS=331} [2024-06-14 13:00:22,825 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 197 predicate places. [2024-06-14 13:00:22,825 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 331 transitions, 4774 flow [2024-06-14 13:00:22,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:22,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:22,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:22,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 13:00:22,825 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)] === [2024-06-14 13:00:22,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:22,826 INFO L85 PathProgramCache]: Analyzing trace with hash -287392272, now seen corresponding path program 2 times [2024-06-14 13:00:22,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:22,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865358829] [2024-06-14 13:00:22,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:22,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:22,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:24,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:24,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:24,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865358829] [2024-06-14 13:00:24,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865358829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:24,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:24,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:00:24,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640868594] [2024-06-14 13:00:24,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:24,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:00:24,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:24,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:00:24,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:00:24,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:00:24,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 331 transitions, 4774 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:24,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:24,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:00:24,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:26,787 INFO L124 PetriNetUnfolderBase]: 3998/6202 cut-off events. [2024-06-14 13:00:26,787 INFO L125 PetriNetUnfolderBase]: For 492950/492956 co-relation queries the response was YES. [2024-06-14 13:00:26,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52451 conditions, 6202 events. 3998/6202 cut-off events. For 492950/492956 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 35493 event pairs, 952 based on Foata normal form. 5/6200 useless extension candidates. Maximal degree in co-relation 52330. Up to 5843 conditions per place. [2024-06-14 13:00:26,865 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 273 selfloop transitions, 83 changer transitions 0/359 dead transitions. [2024-06-14 13:00:26,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 359 transitions, 6002 flow [2024-06-14 13:00:26,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:00:26,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:00:26,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 13:00:26,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:00:26,866 INFO L175 Difference]: Start difference. First operand has 241 places, 331 transitions, 4774 flow. Second operand 7 states and 119 transitions. [2024-06-14 13:00:26,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 359 transitions, 6002 flow [2024-06-14 13:00:27,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 359 transitions, 5889 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-14 13:00:27,839 INFO L231 Difference]: Finished difference. Result has 246 places, 334 transitions, 4895 flow [2024-06-14 13:00:27,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4664, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4895, PETRI_PLACES=246, PETRI_TRANSITIONS=334} [2024-06-14 13:00:27,840 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 202 predicate places. [2024-06-14 13:00:27,840 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 334 transitions, 4895 flow [2024-06-14 13:00:27,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:27,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:27,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:27,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 13:00:27,840 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)] === [2024-06-14 13:00:27,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:27,841 INFO L85 PathProgramCache]: Analyzing trace with hash -287395899, now seen corresponding path program 2 times [2024-06-14 13:00:27,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:27,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35396159] [2024-06-14 13:00:27,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:27,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:27,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:29,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:29,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35396159] [2024-06-14 13:00:29,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35396159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:29,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:29,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:00:29,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081148686] [2024-06-14 13:00:29,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:29,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:00:29,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:29,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:00:29,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:00:29,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:00:29,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 334 transitions, 4895 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:29,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:29,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:00:29,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:31,449 INFO L124 PetriNetUnfolderBase]: 4024/6232 cut-off events. [2024-06-14 13:00:31,450 INFO L125 PetriNetUnfolderBase]: For 514048/514048 co-relation queries the response was YES. [2024-06-14 13:00:31,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53214 conditions, 6232 events. 4024/6232 cut-off events. For 514048/514048 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 35592 event pairs, 931 based on Foata normal form. 2/6232 useless extension candidates. Maximal degree in co-relation 53091. Up to 6144 conditions per place. [2024-06-14 13:00:31,518 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 325 selfloop transitions, 39 changer transitions 0/367 dead transitions. [2024-06-14 13:00:31,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 367 transitions, 6019 flow [2024-06-14 13:00:31,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:00:31,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:00:31,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-14 13:00:31,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35755813953488375 [2024-06-14 13:00:31,519 INFO L175 Difference]: Start difference. First operand has 246 places, 334 transitions, 4895 flow. Second operand 8 states and 123 transitions. [2024-06-14 13:00:31,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 367 transitions, 6019 flow [2024-06-14 13:00:32,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 367 transitions, 5869 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-14 13:00:32,527 INFO L231 Difference]: Finished difference. Result has 252 places, 343 transitions, 5042 flow [2024-06-14 13:00:32,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4745, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5042, PETRI_PLACES=252, PETRI_TRANSITIONS=343} [2024-06-14 13:00:32,528 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 208 predicate places. [2024-06-14 13:00:32,528 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 343 transitions, 5042 flow [2024-06-14 13:00:32,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:32,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:32,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:32,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 13:00:32,528 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)] === [2024-06-14 13:00:32,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:32,529 INFO L85 PathProgramCache]: Analyzing trace with hash -287384739, now seen corresponding path program 3 times [2024-06-14 13:00:32,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:32,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921674279] [2024-06-14 13:00:32,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:32,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:32,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:34,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:34,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:34,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921674279] [2024-06-14 13:00:34,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921674279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:34,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:34,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:00:34,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535859798] [2024-06-14 13:00:34,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:34,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:00:34,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:34,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:00:34,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:00:34,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:00:34,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 343 transitions, 5042 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:34,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:34,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:00:34,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:36,150 INFO L124 PetriNetUnfolderBase]: 4018/6224 cut-off events. [2024-06-14 13:00:36,150 INFO L125 PetriNetUnfolderBase]: For 523131/523131 co-relation queries the response was YES. [2024-06-14 13:00:36,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52984 conditions, 6224 events. 4018/6224 cut-off events. For 523131/523131 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 35524 event pairs, 895 based on Foata normal form. 2/6224 useless extension candidates. Maximal degree in co-relation 52859. Up to 6148 conditions per place. [2024-06-14 13:00:36,237 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 328 selfloop transitions, 34 changer transitions 0/365 dead transitions. [2024-06-14 13:00:36,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 365 transitions, 5831 flow [2024-06-14 13:00:36,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:00:36,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:00:36,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-14 13:00:36,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34593023255813954 [2024-06-14 13:00:36,239 INFO L175 Difference]: Start difference. First operand has 252 places, 343 transitions, 5042 flow. Second operand 8 states and 119 transitions. [2024-06-14 13:00:36,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 365 transitions, 5831 flow [2024-06-14 13:00:37,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 365 transitions, 5677 flow, removed 62 selfloop flow, removed 3 redundant places. [2024-06-14 13:00:37,249 INFO L231 Difference]: Finished difference. Result has 257 places, 343 transitions, 4964 flow [2024-06-14 13:00:37,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4888, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4964, PETRI_PLACES=257, PETRI_TRANSITIONS=343} [2024-06-14 13:00:37,250 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-14 13:00:37,250 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 343 transitions, 4964 flow [2024-06-14 13:00:37,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:37,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:37,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:37,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 13:00:37,251 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)] === [2024-06-14 13:00:37,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:37,251 INFO L85 PathProgramCache]: Analyzing trace with hash -287396240, now seen corresponding path program 3 times [2024-06-14 13:00:37,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:37,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576866067] [2024-06-14 13:00:37,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:37,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:39,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:39,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:39,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576866067] [2024-06-14 13:00:39,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576866067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:39,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:39,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:00:39,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684315479] [2024-06-14 13:00:39,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:39,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:00:39,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:39,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:00:39,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:00:39,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:00:39,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 343 transitions, 4964 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:39,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:39,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:00:39,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:41,060 INFO L124 PetriNetUnfolderBase]: 4023/6231 cut-off events. [2024-06-14 13:00:41,060 INFO L125 PetriNetUnfolderBase]: For 534243/534243 co-relation queries the response was YES. [2024-06-14 13:00:41,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53196 conditions, 6231 events. 4023/6231 cut-off events. For 534243/534243 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 35586 event pairs, 913 based on Foata normal form. 1/6230 useless extension candidates. Maximal degree in co-relation 53069. Up to 6167 conditions per place. [2024-06-14 13:00:41,144 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 339 selfloop transitions, 25 changer transitions 0/367 dead transitions. [2024-06-14 13:00:41,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 367 transitions, 5804 flow [2024-06-14 13:00:41,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:00:41,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:00:41,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2024-06-14 13:00:41,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3372093023255814 [2024-06-14 13:00:41,146 INFO L175 Difference]: Start difference. First operand has 257 places, 343 transitions, 4964 flow. Second operand 8 states and 116 transitions. [2024-06-14 13:00:41,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 367 transitions, 5804 flow [2024-06-14 13:00:42,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 367 transitions, 5723 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 13:00:42,382 INFO L231 Difference]: Finished difference. Result has 258 places, 346 transitions, 4997 flow [2024-06-14 13:00:42,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4883, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4997, PETRI_PLACES=258, PETRI_TRANSITIONS=346} [2024-06-14 13:00:42,382 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 214 predicate places. [2024-06-14 13:00:42,382 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 346 transitions, 4997 flow [2024-06-14 13:00:42,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:42,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:42,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:42,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 13:00:42,383 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)] === [2024-06-14 13:00:42,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:42,383 INFO L85 PathProgramCache]: Analyzing trace with hash -564957922, now seen corresponding path program 3 times [2024-06-14 13:00:42,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:42,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949585322] [2024-06-14 13:00:42,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:42,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:42,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:44,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:44,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:44,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949585322] [2024-06-14 13:00:44,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949585322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:44,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:44,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:00:44,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051387649] [2024-06-14 13:00:44,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:44,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:00:44,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:44,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:00:44,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:00:44,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:00:44,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 346 transitions, 4997 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:44,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:44,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:00:44,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:46,329 INFO L124 PetriNetUnfolderBase]: 4014/6221 cut-off events. [2024-06-14 13:00:46,330 INFO L125 PetriNetUnfolderBase]: For 547671/547692 co-relation queries the response was YES. [2024-06-14 13:00:46,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53123 conditions, 6221 events. 4014/6221 cut-off events. For 547671/547692 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 35578 event pairs, 916 based on Foata normal form. 23/6240 useless extension candidates. Maximal degree in co-relation 52995. Up to 5871 conditions per place. [2024-06-14 13:00:46,410 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 294 selfloop transitions, 75 changer transitions 0/372 dead transitions. [2024-06-14 13:00:46,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 372 transitions, 6089 flow [2024-06-14 13:00:46,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:00:46,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:00:46,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 13:00:46,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-14 13:00:46,411 INFO L175 Difference]: Start difference. First operand has 258 places, 346 transitions, 4997 flow. Second operand 7 states and 117 transitions. [2024-06-14 13:00:46,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 372 transitions, 6089 flow [2024-06-14 13:00:47,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 372 transitions, 5969 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-14 13:00:47,556 INFO L231 Difference]: Finished difference. Result has 259 places, 346 transitions, 5037 flow [2024-06-14 13:00:47,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4877, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5037, PETRI_PLACES=259, PETRI_TRANSITIONS=346} [2024-06-14 13:00:47,557 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 215 predicate places. [2024-06-14 13:00:47,557 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 346 transitions, 5037 flow [2024-06-14 13:00:47,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:47,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:47,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:47,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 13:00:47,558 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)] === [2024-06-14 13:00:47,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:47,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1665062088, now seen corresponding path program 4 times [2024-06-14 13:00:47,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:47,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275701748] [2024-06-14 13:00:47,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:47,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:49,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:49,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:49,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275701748] [2024-06-14 13:00:49,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275701748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:49,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:49,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:00:49,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612210838] [2024-06-14 13:00:49,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:49,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:00:49,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:49,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:00:49,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:00:49,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:00:49,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 346 transitions, 5037 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:49,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:49,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:00:49,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:51,718 INFO L124 PetriNetUnfolderBase]: 3975/6165 cut-off events. [2024-06-14 13:00:51,718 INFO L125 PetriNetUnfolderBase]: For 554770/554770 co-relation queries the response was YES. [2024-06-14 13:00:51,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52469 conditions, 6165 events. 3975/6165 cut-off events. For 554770/554770 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 35227 event pairs, 888 based on Foata normal form. 9/6172 useless extension candidates. Maximal degree in co-relation 52340. Up to 6019 conditions per place. [2024-06-14 13:00:51,799 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 327 selfloop transitions, 40 changer transitions 0/370 dead transitions. [2024-06-14 13:00:51,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 370 transitions, 5874 flow [2024-06-14 13:00:51,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:00:51,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:00:51,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 13:00:51,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36627906976744184 [2024-06-14 13:00:51,800 INFO L175 Difference]: Start difference. First operand has 259 places, 346 transitions, 5037 flow. Second operand 8 states and 126 transitions. [2024-06-14 13:00:51,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 370 transitions, 5874 flow [2024-06-14 13:00:52,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 370 transitions, 5670 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-14 13:00:52,771 INFO L231 Difference]: Finished difference. Result has 262 places, 346 transitions, 4928 flow [2024-06-14 13:00:52,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4834, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4928, PETRI_PLACES=262, PETRI_TRANSITIONS=346} [2024-06-14 13:00:52,771 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 218 predicate places. [2024-06-14 13:00:52,771 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 346 transitions, 4928 flow [2024-06-14 13:00:52,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:52,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:52,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:52,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 13:00:52,772 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)] === [2024-06-14 13:00:52,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:52,772 INFO L85 PathProgramCache]: Analyzing trace with hash 36405286, now seen corresponding path program 5 times [2024-06-14 13:00:52,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:52,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877304402] [2024-06-14 13:00:52,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:52,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:54,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:54,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:54,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877304402] [2024-06-14 13:00:54,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877304402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:54,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:54,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:00:54,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983735559] [2024-06-14 13:00:54,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:54,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:00:54,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:54,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:00:54,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:00:54,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:00:54,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 346 transitions, 4928 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:54,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:54,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:00:54,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:56,893 INFO L124 PetriNetUnfolderBase]: 3964/6151 cut-off events. [2024-06-14 13:00:56,893 INFO L125 PetriNetUnfolderBase]: For 550857/550857 co-relation queries the response was YES. [2024-06-14 13:00:56,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51796 conditions, 6151 events. 3964/6151 cut-off events. For 550857/550857 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 35153 event pairs, 875 based on Foata normal form. 9/6158 useless extension candidates. Maximal degree in co-relation 51666. Up to 5715 conditions per place. [2024-06-14 13:00:56,960 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 287 selfloop transitions, 98 changer transitions 0/388 dead transitions. [2024-06-14 13:00:56,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 388 transitions, 6041 flow [2024-06-14 13:00:56,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:00:56,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:00:56,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 13:00:56,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 13:00:56,961 INFO L175 Difference]: Start difference. First operand has 262 places, 346 transitions, 4928 flow. Second operand 8 states and 147 transitions. [2024-06-14 13:00:56,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 388 transitions, 6041 flow [2024-06-14 13:00:57,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 388 transitions, 5961 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:00:57,949 INFO L231 Difference]: Finished difference. Result has 263 places, 349 transitions, 5156 flow [2024-06-14 13:00:57,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4848, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5156, PETRI_PLACES=263, PETRI_TRANSITIONS=349} [2024-06-14 13:00:57,949 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 219 predicate places. [2024-06-14 13:00:57,951 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 349 transitions, 5156 flow [2024-06-14 13:00:57,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:57,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:57,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:57,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 13:00:57,955 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)] === [2024-06-14 13:00:57,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:57,956 INFO L85 PathProgramCache]: Analyzing trace with hash -578832494, now seen corresponding path program 6 times [2024-06-14 13:00:57,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:57,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975579422] [2024-06-14 13:00:57,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:57,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:57,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:59,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:59,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:59,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975579422] [2024-06-14 13:00:59,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975579422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:59,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:59,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:00:59,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131929177] [2024-06-14 13:00:59,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:59,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:00:59,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:59,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:00:59,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:00:59,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:00:59,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 349 transitions, 5156 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:59,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:59,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:00:59,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:01,862 INFO L124 PetriNetUnfolderBase]: 3943/6122 cut-off events. [2024-06-14 13:01:01,862 INFO L125 PetriNetUnfolderBase]: For 544505/544508 co-relation queries the response was YES. [2024-06-14 13:01:01,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51976 conditions, 6122 events. 3943/6122 cut-off events. For 544505/544508 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 35006 event pairs, 870 based on Foata normal form. 5/6124 useless extension candidates. Maximal degree in co-relation 51845. Up to 5697 conditions per place. [2024-06-14 13:01:01,939 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 281 selfloop transitions, 99 changer transitions 0/383 dead transitions. [2024-06-14 13:01:01,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 383 transitions, 6042 flow [2024-06-14 13:01:01,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:01:01,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:01:01,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 13:01:01,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-14 13:01:01,940 INFO L175 Difference]: Start difference. First operand has 263 places, 349 transitions, 5156 flow. Second operand 7 states and 130 transitions. [2024-06-14 13:01:01,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 383 transitions, 6042 flow [2024-06-14 13:01:03,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 383 transitions, 5773 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-06-14 13:01:03,090 INFO L231 Difference]: Finished difference. Result has 263 places, 349 transitions, 5107 flow [2024-06-14 13:01:03,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4887, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5107, PETRI_PLACES=263, PETRI_TRANSITIONS=349} [2024-06-14 13:01:03,091 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 219 predicate places. [2024-06-14 13:01:03,091 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 349 transitions, 5107 flow [2024-06-14 13:01:03,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:03,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:03,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:03,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 13:01:03,092 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)] === [2024-06-14 13:01:03,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:03,092 INFO L85 PathProgramCache]: Analyzing trace with hash -578836121, now seen corresponding path program 4 times [2024-06-14 13:01:03,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:03,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464228702] [2024-06-14 13:01:03,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:03,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:03,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:04,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:04,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:04,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464228702] [2024-06-14 13:01:04,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464228702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:04,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:04,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:01:04,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584515461] [2024-06-14 13:01:04,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:04,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:01:04,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:04,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:01:04,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:01:04,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:01:04,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 349 transitions, 5107 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:04,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:04,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:01:04,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:06,713 INFO L124 PetriNetUnfolderBase]: 3945/6124 cut-off events. [2024-06-14 13:01:06,713 INFO L125 PetriNetUnfolderBase]: For 526363/526363 co-relation queries the response was YES. [2024-06-14 13:01:06,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51561 conditions, 6124 events. 3945/6124 cut-off events. For 526363/526363 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 35009 event pairs, 914 based on Foata normal form. 2/6124 useless extension candidates. Maximal degree in co-relation 51431. Up to 6011 conditions per place. [2024-06-14 13:01:06,777 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 338 selfloop transitions, 42 changer transitions 0/383 dead transitions. [2024-06-14 13:01:06,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 383 transitions, 6175 flow [2024-06-14 13:01:06,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:01:06,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:01:06,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 13:01:06,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-14 13:01:06,778 INFO L175 Difference]: Start difference. First operand has 263 places, 349 transitions, 5107 flow. Second operand 7 states and 121 transitions. [2024-06-14 13:01:06,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 383 transitions, 6175 flow [2024-06-14 13:01:07,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 383 transitions, 5868 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 13:01:07,704 INFO L231 Difference]: Finished difference. Result has 262 places, 352 transitions, 4965 flow [2024-06-14 13:01:07,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4802, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4965, PETRI_PLACES=262, PETRI_TRANSITIONS=352} [2024-06-14 13:01:07,704 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 218 predicate places. [2024-06-14 13:01:07,705 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 352 transitions, 4965 flow [2024-06-14 13:01:07,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:07,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:07,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:07,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 13:01:07,705 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)] === [2024-06-14 13:01:07,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:07,706 INFO L85 PathProgramCache]: Analyzing trace with hash -135546382, now seen corresponding path program 4 times [2024-06-14 13:01:07,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:07,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644364341] [2024-06-14 13:01:07,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:07,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:07,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:09,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:09,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:09,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644364341] [2024-06-14 13:01:09,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644364341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:09,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:09,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:01:09,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809907593] [2024-06-14 13:01:09,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:09,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:01:09,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:09,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:01:09,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:01:09,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:01:09,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 352 transitions, 4965 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:09,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:09,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:01:09,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:11,555 INFO L124 PetriNetUnfolderBase]: 3952/6134 cut-off events. [2024-06-14 13:01:11,556 INFO L125 PetriNetUnfolderBase]: For 523748/523748 co-relation queries the response was YES. [2024-06-14 13:01:11,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51125 conditions, 6134 events. 3952/6134 cut-off events. For 523748/523748 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 35063 event pairs, 898 based on Foata normal form. 3/6135 useless extension candidates. Maximal degree in co-relation 50995. Up to 6009 conditions per place. [2024-06-14 13:01:11,631 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 349 selfloop transitions, 41 changer transitions 0/393 dead transitions. [2024-06-14 13:01:11,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 393 transitions, 5930 flow [2024-06-14 13:01:11,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:01:11,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:01:11,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 13:01:11,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-14 13:01:11,632 INFO L175 Difference]: Start difference. First operand has 262 places, 352 transitions, 4965 flow. Second operand 7 states and 130 transitions. [2024-06-14 13:01:11,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 393 transitions, 5930 flow [2024-06-14 13:01:12,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 393 transitions, 5706 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-14 13:01:12,639 INFO L231 Difference]: Finished difference. Result has 262 places, 355 transitions, 4910 flow [2024-06-14 13:01:12,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4741, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4910, PETRI_PLACES=262, PETRI_TRANSITIONS=355} [2024-06-14 13:01:12,639 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 218 predicate places. [2024-06-14 13:01:12,639 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 355 transitions, 4910 flow [2024-06-14 13:01:12,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:12,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:12,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:12,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 13:01:12,640 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)] === [2024-06-14 13:01:12,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:12,640 INFO L85 PathProgramCache]: Analyzing trace with hash -578824961, now seen corresponding path program 5 times [2024-06-14 13:01:12,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:12,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880637686] [2024-06-14 13:01:12,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:12,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:14,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:14,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:14,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880637686] [2024-06-14 13:01:14,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880637686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:14,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:14,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:01:14,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818696197] [2024-06-14 13:01:14,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:14,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:01:14,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:14,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:01:14,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:01:14,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:01:14,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 355 transitions, 4910 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:14,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:14,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:01:14,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:16,039 INFO L124 PetriNetUnfolderBase]: 3946/6126 cut-off events. [2024-06-14 13:01:16,039 INFO L125 PetriNetUnfolderBase]: For 529905/529905 co-relation queries the response was YES. [2024-06-14 13:01:16,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51303 conditions, 6126 events. 3946/6126 cut-off events. For 529905/529905 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 35068 event pairs, 897 based on Foata normal form. 2/6126 useless extension candidates. Maximal degree in co-relation 51174. Up to 6058 conditions per place. [2024-06-14 13:01:16,117 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 344 selfloop transitions, 29 changer transitions 0/376 dead transitions. [2024-06-14 13:01:16,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 376 transitions, 5719 flow [2024-06-14 13:01:16,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:01:16,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:01:16,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-14 13:01:16,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36212624584717606 [2024-06-14 13:01:16,118 INFO L175 Difference]: Start difference. First operand has 262 places, 355 transitions, 4910 flow. Second operand 7 states and 109 transitions. [2024-06-14 13:01:16,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 376 transitions, 5719 flow [2024-06-14 13:01:17,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 376 transitions, 5538 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-14 13:01:17,115 INFO L231 Difference]: Finished difference. Result has 264 places, 355 transitions, 4795 flow [2024-06-14 13:01:17,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4729, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4795, PETRI_PLACES=264, PETRI_TRANSITIONS=355} [2024-06-14 13:01:17,115 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-14 13:01:17,115 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 355 transitions, 4795 flow [2024-06-14 13:01:17,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:17,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:17,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:17,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 13:01:17,116 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)] === [2024-06-14 13:01:17,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:17,116 INFO L85 PathProgramCache]: Analyzing trace with hash 910720493, now seen corresponding path program 1 times [2024-06-14 13:01:17,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:17,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608346064] [2024-06-14 13:01:17,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:17,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:17,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:19,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:19,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:19,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608346064] [2024-06-14 13:01:19,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608346064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:19,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:19,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:01:19,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056606142] [2024-06-14 13:01:19,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:19,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:01:19,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:19,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:01:19,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:01:19,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:01:19,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 355 transitions, 4795 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:19,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:19,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:01:19,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:21,592 INFO L124 PetriNetUnfolderBase]: 4018/6228 cut-off events. [2024-06-14 13:01:21,593 INFO L125 PetriNetUnfolderBase]: For 569910/569929 co-relation queries the response was YES. [2024-06-14 13:01:21,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52430 conditions, 6228 events. 4018/6228 cut-off events. For 569910/569929 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 35645 event pairs, 886 based on Foata normal form. 26/6250 useless extension candidates. Maximal degree in co-relation 52300. Up to 5533 conditions per place. [2024-06-14 13:01:21,669 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 277 selfloop transitions, 118 changer transitions 0/398 dead transitions. [2024-06-14 13:01:21,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 398 transitions, 6244 flow [2024-06-14 13:01:21,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:01:21,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:01:21,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 13:01:21,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:01:21,671 INFO L175 Difference]: Start difference. First operand has 264 places, 355 transitions, 4795 flow. Second operand 8 states and 136 transitions. [2024-06-14 13:01:21,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 398 transitions, 6244 flow [2024-06-14 13:01:22,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 398 transitions, 6128 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 13:01:22,729 INFO L231 Difference]: Finished difference. Result has 267 places, 367 transitions, 5267 flow [2024-06-14 13:01:22,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4679, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5267, PETRI_PLACES=267, PETRI_TRANSITIONS=367} [2024-06-14 13:01:22,729 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 223 predicate places. [2024-06-14 13:01:22,729 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 367 transitions, 5267 flow [2024-06-14 13:01:22,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:22,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:22,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:22,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 13:01:22,730 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)] === [2024-06-14 13:01:22,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:22,730 INFO L85 PathProgramCache]: Analyzing trace with hash 914439563, now seen corresponding path program 2 times [2024-06-14 13:01:22,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:22,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105334825] [2024-06-14 13:01:22,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:22,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:25,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:25,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:25,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105334825] [2024-06-14 13:01:25,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105334825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:25,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:25,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:01:25,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876987157] [2024-06-14 13:01:25,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:25,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:01:25,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:25,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:01:25,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:01:25,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:01:25,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 367 transitions, 5267 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:25,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:25,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:01:25,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:27,359 INFO L124 PetriNetUnfolderBase]: 4138/6393 cut-off events. [2024-06-14 13:01:27,360 INFO L125 PetriNetUnfolderBase]: For 620421/620421 co-relation queries the response was YES. [2024-06-14 13:01:27,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56055 conditions, 6393 events. 4138/6393 cut-off events. For 620421/620421 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 36657 event pairs, 882 based on Foata normal form. 8/6399 useless extension candidates. Maximal degree in co-relation 55923. Up to 6147 conditions per place. [2024-06-14 13:01:27,430 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 354 selfloop transitions, 50 changer transitions 0/407 dead transitions. [2024-06-14 13:01:27,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 407 transitions, 6757 flow [2024-06-14 13:01:27,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:01:27,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:01:27,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-14 13:01:27,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3643410852713178 [2024-06-14 13:01:27,432 INFO L175 Difference]: Start difference. First operand has 267 places, 367 transitions, 5267 flow. Second operand 9 states and 141 transitions. [2024-06-14 13:01:27,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 407 transitions, 6757 flow [2024-06-14 13:01:28,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 407 transitions, 6592 flow, removed 64 selfloop flow, removed 3 redundant places. [2024-06-14 13:01:28,718 INFO L231 Difference]: Finished difference. Result has 274 places, 378 transitions, 5513 flow [2024-06-14 13:01:28,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5132, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5513, PETRI_PLACES=274, PETRI_TRANSITIONS=378} [2024-06-14 13:01:28,719 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-14 13:01:28,719 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 378 transitions, 5513 flow [2024-06-14 13:01:28,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:28,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:28,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:28,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 13:01:28,719 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)] === [2024-06-14 13:01:28,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:28,720 INFO L85 PathProgramCache]: Analyzing trace with hash -573110483, now seen corresponding path program 3 times [2024-06-14 13:01:28,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:28,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031982639] [2024-06-14 13:01:28,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:28,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:28,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:31,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:31,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031982639] [2024-06-14 13:01:31,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031982639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:31,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:31,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:01:31,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622879308] [2024-06-14 13:01:31,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:31,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:01:31,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:31,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:01:31,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:01:31,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:01:31,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 378 transitions, 5513 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:31,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:31,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:01:31,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:33,440 INFO L124 PetriNetUnfolderBase]: 4226/6514 cut-off events. [2024-06-14 13:01:33,441 INFO L125 PetriNetUnfolderBase]: For 648970/648970 co-relation queries the response was YES. [2024-06-14 13:01:33,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57272 conditions, 6514 events. 4226/6514 cut-off events. For 648970/648970 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 37293 event pairs, 868 based on Foata normal form. 8/6520 useless extension candidates. Maximal degree in co-relation 57137. Up to 5880 conditions per place. [2024-06-14 13:01:33,526 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 302 selfloop transitions, 126 changer transitions 0/431 dead transitions. [2024-06-14 13:01:33,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 431 transitions, 7058 flow [2024-06-14 13:01:33,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:01:33,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:01:33,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 13:01:33,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-14 13:01:33,529 INFO L175 Difference]: Start difference. First operand has 274 places, 378 transitions, 5513 flow. Second operand 9 states and 160 transitions. [2024-06-14 13:01:33,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 431 transitions, 7058 flow [2024-06-14 13:01:34,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 431 transitions, 6954 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-14 13:01:34,746 INFO L231 Difference]: Finished difference. Result has 280 places, 388 transitions, 6000 flow [2024-06-14 13:01:34,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5409, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6000, PETRI_PLACES=280, PETRI_TRANSITIONS=388} [2024-06-14 13:01:34,746 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 236 predicate places. [2024-06-14 13:01:34,746 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 388 transitions, 6000 flow [2024-06-14 13:01:34,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:34,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:34,747 INFO 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] [2024-06-14 13:01:34,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 13:01:34,747 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)] === [2024-06-14 13:01:34,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:34,748 INFO L85 PathProgramCache]: Analyzing trace with hash -222546529, now seen corresponding path program 1 times [2024-06-14 13:01:34,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:34,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433836577] [2024-06-14 13:01:34,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:34,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:34,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:37,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:37,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:37,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433836577] [2024-06-14 13:01:37,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433836577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:37,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:37,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:01:37,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445250041] [2024-06-14 13:01:37,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:37,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:01:37,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:37,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:01:37,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:01:37,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:01:37,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 388 transitions, 6000 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:37,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:37,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:01:37,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:39,244 INFO L124 PetriNetUnfolderBase]: 4234/6526 cut-off events. [2024-06-14 13:01:39,245 INFO L125 PetriNetUnfolderBase]: For 651503/651503 co-relation queries the response was YES. [2024-06-14 13:01:39,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58322 conditions, 6526 events. 4234/6526 cut-off events. For 651503/651503 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 37173 event pairs, 849 based on Foata normal form. 2/6526 useless extension candidates. Maximal degree in co-relation 58184. Up to 6340 conditions per place. [2024-06-14 13:01:39,334 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 386 selfloop transitions, 48 changer transitions 0/437 dead transitions. [2024-06-14 13:01:39,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 437 transitions, 7232 flow [2024-06-14 13:01:39,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:01:39,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:01:39,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 13:01:39,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-14 13:01:39,335 INFO L175 Difference]: Start difference. First operand has 280 places, 388 transitions, 6000 flow. Second operand 9 states and 150 transitions. [2024-06-14 13:01:39,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 437 transitions, 7232 flow [2024-06-14 13:01:40,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 437 transitions, 7106 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-14 13:01:40,746 INFO L231 Difference]: Finished difference. Result has 285 places, 392 transitions, 6069 flow [2024-06-14 13:01:40,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5876, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6069, PETRI_PLACES=285, PETRI_TRANSITIONS=392} [2024-06-14 13:01:40,747 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 241 predicate places. [2024-06-14 13:01:40,747 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 392 transitions, 6069 flow [2024-06-14 13:01:40,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:40,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:40,747 INFO 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] [2024-06-14 13:01:40,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 13:01:40,748 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)] === [2024-06-14 13:01:40,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:40,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1578797489, now seen corresponding path program 2 times [2024-06-14 13:01:40,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:40,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418533993] [2024-06-14 13:01:40,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:40,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:40,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:43,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:43,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:43,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418533993] [2024-06-14 13:01:43,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418533993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:43,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:43,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:01:43,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489975613] [2024-06-14 13:01:43,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:43,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:01:43,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:43,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:01:43,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:01:43,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:01:43,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 392 transitions, 6069 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:43,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:43,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:01:43,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:45,039 INFO L124 PetriNetUnfolderBase]: 4242/6538 cut-off events. [2024-06-14 13:01:45,040 INFO L125 PetriNetUnfolderBase]: For 651054/651054 co-relation queries the response was YES. [2024-06-14 13:01:45,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58415 conditions, 6538 events. 4242/6538 cut-off events. For 651054/651054 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 37467 event pairs, 968 based on Foata normal form. 2/6538 useless extension candidates. Maximal degree in co-relation 58275. Up to 6407 conditions per place. [2024-06-14 13:01:45,269 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 385 selfloop transitions, 45 changer transitions 0/433 dead transitions. [2024-06-14 13:01:45,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 433 transitions, 7089 flow [2024-06-14 13:01:45,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:01:45,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:01:45,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 13:01:45,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 13:01:45,270 INFO L175 Difference]: Start difference. First operand has 285 places, 392 transitions, 6069 flow. Second operand 9 states and 144 transitions. [2024-06-14 13:01:45,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 433 transitions, 7089 flow [2024-06-14 13:01:46,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 433 transitions, 6960 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-14 13:01:46,499 INFO L231 Difference]: Finished difference. Result has 289 places, 394 transitions, 6087 flow [2024-06-14 13:01:46,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5958, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6087, PETRI_PLACES=289, PETRI_TRANSITIONS=394} [2024-06-14 13:01:46,499 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 245 predicate places. [2024-06-14 13:01:46,500 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 394 transitions, 6087 flow [2024-06-14 13:01:46,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:46,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:46,500 INFO 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] [2024-06-14 13:01:46,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 13:01:46,500 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)] === [2024-06-14 13:01:46,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:46,501 INFO L85 PathProgramCache]: Analyzing trace with hash -614566029, now seen corresponding path program 1 times [2024-06-14 13:01:46,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:46,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031825669] [2024-06-14 13:01:46,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:46,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:46,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:48,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:48,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:48,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031825669] [2024-06-14 13:01:48,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031825669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:48,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:48,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:01:48,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231786893] [2024-06-14 13:01:48,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:48,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:01:48,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:48,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:01:48,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:01:48,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:01:48,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 394 transitions, 6087 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:48,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:48,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:01:48,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:51,170 INFO L124 PetriNetUnfolderBase]: 4260/6563 cut-off events. [2024-06-14 13:01:51,170 INFO L125 PetriNetUnfolderBase]: For 669053/669053 co-relation queries the response was YES. [2024-06-14 13:01:51,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58928 conditions, 6563 events. 4260/6563 cut-off events. For 669053/669053 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 37556 event pairs, 969 based on Foata normal form. 2/6563 useless extension candidates. Maximal degree in co-relation 58786. Up to 6343 conditions per place. [2024-06-14 13:01:51,270 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 361 selfloop transitions, 82 changer transitions 0/446 dead transitions. [2024-06-14 13:01:51,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 446 transitions, 7424 flow [2024-06-14 13:01:51,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:01:51,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:01:51,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 173 transitions. [2024-06-14 13:01:51,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3657505285412262 [2024-06-14 13:01:51,273 INFO L175 Difference]: Start difference. First operand has 289 places, 394 transitions, 6087 flow. Second operand 11 states and 173 transitions. [2024-06-14 13:01:51,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 446 transitions, 7424 flow [2024-06-14 13:01:52,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 446 transitions, 7315 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 13:01:52,641 INFO L231 Difference]: Finished difference. Result has 293 places, 400 transitions, 6304 flow [2024-06-14 13:01:52,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5978, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6304, PETRI_PLACES=293, PETRI_TRANSITIONS=400} [2024-06-14 13:01:52,642 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 249 predicate places. [2024-06-14 13:01:52,642 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 400 transitions, 6304 flow [2024-06-14 13:01:52,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:52,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:52,642 INFO 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] [2024-06-14 13:01:52,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 13:01:52,642 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)] === [2024-06-14 13:01:52,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:52,643 INFO L85 PathProgramCache]: Analyzing trace with hash -219686593, now seen corresponding path program 1 times [2024-06-14 13:01:52,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:52,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717488081] [2024-06-14 13:01:52,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:52,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:52,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:55,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:55,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:55,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717488081] [2024-06-14 13:01:55,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717488081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:55,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:55,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:01:55,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311729924] [2024-06-14 13:01:55,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:55,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:01:55,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:55,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:01:55,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:01:55,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:01:55,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 400 transitions, 6304 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:55,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:55,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:01:55,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:57,192 INFO L124 PetriNetUnfolderBase]: 4273/6581 cut-off events. [2024-06-14 13:01:57,193 INFO L125 PetriNetUnfolderBase]: For 688124/688124 co-relation queries the response was YES. [2024-06-14 13:01:57,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59834 conditions, 6581 events. 4273/6581 cut-off events. For 688124/688124 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 37743 event pairs, 969 based on Foata normal form. 1/6580 useless extension candidates. Maximal degree in co-relation 59691. Up to 6465 conditions per place. [2024-06-14 13:01:57,286 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 400 selfloop transitions, 37 changer transitions 0/440 dead transitions. [2024-06-14 13:01:57,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 440 transitions, 7548 flow [2024-06-14 13:01:57,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:01:57,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:01:57,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 13:01:57,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-14 13:01:57,288 INFO L175 Difference]: Start difference. First operand has 293 places, 400 transitions, 6304 flow. Second operand 8 states and 131 transitions. [2024-06-14 13:01:57,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 440 transitions, 7548 flow [2024-06-14 13:01:58,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 440 transitions, 7391 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-14 13:01:58,830 INFO L231 Difference]: Finished difference. Result has 294 places, 406 transitions, 6353 flow [2024-06-14 13:01:58,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6147, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6353, PETRI_PLACES=294, PETRI_TRANSITIONS=406} [2024-06-14 13:01:58,831 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 250 predicate places. [2024-06-14 13:01:58,831 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 406 transitions, 6353 flow [2024-06-14 13:01:58,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:58,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:58,831 INFO 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] [2024-06-14 13:01:58,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 13:01:58,831 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)] === [2024-06-14 13:01:58,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:58,832 INFO L85 PathProgramCache]: Analyzing trace with hash 11443781, now seen corresponding path program 2 times [2024-06-14 13:01:58,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:58,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360690105] [2024-06-14 13:01:58,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:58,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:01,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:01,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360690105] [2024-06-14 13:02:01,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360690105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:01,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:01,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:02:01,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547792985] [2024-06-14 13:02:01,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:01,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:02:01,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:01,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:02:01,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:02:01,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:02:01,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 406 transitions, 6353 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:01,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:01,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:02:01,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:03,525 INFO L124 PetriNetUnfolderBase]: 4278/6588 cut-off events. [2024-06-14 13:02:03,525 INFO L125 PetriNetUnfolderBase]: For 705920/705920 co-relation queries the response was YES. [2024-06-14 13:02:03,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60317 conditions, 6588 events. 4278/6588 cut-off events. For 705920/705920 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 37717 event pairs, 967 based on Foata normal form. 1/6587 useless extension candidates. Maximal degree in co-relation 60172. Up to 6491 conditions per place. [2024-06-14 13:02:03,614 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 403 selfloop transitions, 32 changer transitions 0/438 dead transitions. [2024-06-14 13:02:03,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 438 transitions, 7373 flow [2024-06-14 13:02:03,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:02:03,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:02:03,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 13:02:03,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3633720930232558 [2024-06-14 13:02:03,615 INFO L175 Difference]: Start difference. First operand has 294 places, 406 transitions, 6353 flow. Second operand 8 states and 125 transitions. [2024-06-14 13:02:03,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 438 transitions, 7373 flow [2024-06-14 13:02:04,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 438 transitions, 7240 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-14 13:02:04,890 INFO L231 Difference]: Finished difference. Result has 298 places, 409 transitions, 6362 flow [2024-06-14 13:02:04,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6242, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6362, PETRI_PLACES=298, PETRI_TRANSITIONS=409} [2024-06-14 13:02:04,890 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 254 predicate places. [2024-06-14 13:02:04,890 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 409 transitions, 6362 flow [2024-06-14 13:02:04,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:04,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:04,891 INFO 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] [2024-06-14 13:02:04,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 13:02:04,891 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)] === [2024-06-14 13:02:04,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:04,897 INFO L85 PathProgramCache]: Analyzing trace with hash -606234469, now seen corresponding path program 3 times [2024-06-14 13:02:04,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:04,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488699739] [2024-06-14 13:02:04,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:04,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:07,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:07,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:07,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488699739] [2024-06-14 13:02:07,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488699739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:07,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:07,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:02:07,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250278468] [2024-06-14 13:02:07,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:07,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:02:07,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:07,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:02:07,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:02:07,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:02:07,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 409 transitions, 6362 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:07,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:07,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:02:07,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:09,398 INFO L124 PetriNetUnfolderBase]: 4286/6600 cut-off events. [2024-06-14 13:02:09,399 INFO L125 PetriNetUnfolderBase]: For 725270/725270 co-relation queries the response was YES. [2024-06-14 13:02:09,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60595 conditions, 6600 events. 4286/6600 cut-off events. For 725270/725270 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 37858 event pairs, 965 based on Foata normal form. 2/6600 useless extension candidates. Maximal degree in co-relation 60448. Up to 6497 conditions per place. [2024-06-14 13:02:09,479 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 405 selfloop transitions, 34 changer transitions 0/442 dead transitions. [2024-06-14 13:02:09,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 442 transitions, 7362 flow [2024-06-14 13:02:09,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:02:09,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:02:09,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-14 13:02:09,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3488372093023256 [2024-06-14 13:02:09,481 INFO L175 Difference]: Start difference. First operand has 298 places, 409 transitions, 6362 flow. Second operand 9 states and 135 transitions. [2024-06-14 13:02:09,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 442 transitions, 7362 flow [2024-06-14 13:02:11,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 442 transitions, 7270 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 13:02:11,221 INFO L231 Difference]: Finished difference. Result has 301 places, 411 transitions, 6381 flow [2024-06-14 13:02:11,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6270, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6381, PETRI_PLACES=301, PETRI_TRANSITIONS=411} [2024-06-14 13:02:11,222 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 257 predicate places. [2024-06-14 13:02:11,222 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 411 transitions, 6381 flow [2024-06-14 13:02:11,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:11,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:11,223 INFO 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] [2024-06-14 13:02:11,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 13:02:11,223 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)] === [2024-06-14 13:02:11,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:11,223 INFO L85 PathProgramCache]: Analyzing trace with hash 778408979, now seen corresponding path program 3 times [2024-06-14 13:02:11,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:11,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741748021] [2024-06-14 13:02:11,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:11,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:13,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:13,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741748021] [2024-06-14 13:02:13,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741748021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:13,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:13,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:02:13,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203368729] [2024-06-14 13:02:13,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:13,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:02:13,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:13,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:02:13,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:02:13,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:02:13,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 411 transitions, 6381 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:13,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:13,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:02:13,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:15,960 INFO L124 PetriNetUnfolderBase]: 4299/6622 cut-off events. [2024-06-14 13:02:15,960 INFO L125 PetriNetUnfolderBase]: For 744386/744392 co-relation queries the response was YES. [2024-06-14 13:02:16,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61052 conditions, 6622 events. 4299/6622 cut-off events. For 744386/744392 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 38041 event pairs, 983 based on Foata normal form. 5/6620 useless extension candidates. Maximal degree in co-relation 60904. Up to 6252 conditions per place. [2024-06-14 13:02:16,037 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 362 selfloop transitions, 86 changer transitions 0/451 dead transitions. [2024-06-14 13:02:16,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 451 transitions, 7959 flow [2024-06-14 13:02:16,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:02:16,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:02:16,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 13:02:16,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:02:16,047 INFO L175 Difference]: Start difference. First operand has 301 places, 411 transitions, 6381 flow. Second operand 8 states and 136 transitions. [2024-06-14 13:02:16,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 451 transitions, 7959 flow [2024-06-14 13:02:17,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 451 transitions, 7868 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 13:02:17,633 INFO L231 Difference]: Finished difference. Result has 302 places, 417 transitions, 6580 flow [2024-06-14 13:02:17,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6290, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6580, PETRI_PLACES=302, PETRI_TRANSITIONS=417} [2024-06-14 13:02:17,634 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 258 predicate places. [2024-06-14 13:02:17,634 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 417 transitions, 6580 flow [2024-06-14 13:02:17,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:17,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:17,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:17,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 13:02:17,634 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)] === [2024-06-14 13:02:17,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:17,635 INFO L85 PathProgramCache]: Analyzing trace with hash -496355713, now seen corresponding path program 4 times [2024-06-14 13:02:17,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:17,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506823629] [2024-06-14 13:02:17,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:17,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:19,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:19,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:19,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506823629] [2024-06-14 13:02:19,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506823629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:19,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:19,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:02:19,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746827119] [2024-06-14 13:02:19,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:19,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:02:19,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:19,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:02:19,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:02:19,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:02:19,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 417 transitions, 6580 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:19,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:19,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:02:19,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:21,907 INFO L124 PetriNetUnfolderBase]: 4304/6627 cut-off events. [2024-06-14 13:02:21,907 INFO L125 PetriNetUnfolderBase]: For 761752/761758 co-relation queries the response was YES. [2024-06-14 13:02:21,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61665 conditions, 6627 events. 4304/6627 cut-off events. For 761752/761758 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 38061 event pairs, 956 based on Foata normal form. 5/6627 useless extension candidates. Maximal degree in co-relation 61516. Up to 6385 conditions per place. [2024-06-14 13:02:22,002 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 394 selfloop transitions, 72 changer transitions 0/469 dead transitions. [2024-06-14 13:02:22,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 469 transitions, 8376 flow [2024-06-14 13:02:22,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:02:22,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:02:22,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 13:02:22,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 13:02:22,004 INFO L175 Difference]: Start difference. First operand has 302 places, 417 transitions, 6580 flow. Second operand 8 states and 128 transitions. [2024-06-14 13:02:22,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 469 transitions, 8376 flow [2024-06-14 13:02:23,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 469 transitions, 8201 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 13:02:23,987 INFO L231 Difference]: Finished difference. Result has 308 places, 441 transitions, 7133 flow [2024-06-14 13:02:23,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6433, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7133, PETRI_PLACES=308, PETRI_TRANSITIONS=441} [2024-06-14 13:02:23,987 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 264 predicate places. [2024-06-14 13:02:23,988 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 441 transitions, 7133 flow [2024-06-14 13:02:23,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:23,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:23,988 INFO 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] [2024-06-14 13:02:23,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 13:02:23,988 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)] === [2024-06-14 13:02:23,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:23,989 INFO L85 PathProgramCache]: Analyzing trace with hash -496355341, now seen corresponding path program 1 times [2024-06-14 13:02:23,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:23,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121062372] [2024-06-14 13:02:23,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:23,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:24,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:26,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:26,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:26,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121062372] [2024-06-14 13:02:26,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121062372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:26,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:26,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:02:26,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431561890] [2024-06-14 13:02:26,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:26,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:02:26,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:26,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:02:26,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:02:26,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:02:26,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 441 transitions, 7133 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:26,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:26,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:02:26,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:28,843 INFO L124 PetriNetUnfolderBase]: 4346/6688 cut-off events. [2024-06-14 13:02:28,843 INFO L125 PetriNetUnfolderBase]: For 799656/799662 co-relation queries the response was YES. [2024-06-14 13:02:28,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63639 conditions, 6688 events. 4346/6688 cut-off events. For 799656/799662 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 38360 event pairs, 972 based on Foata normal form. 6/6687 useless extension candidates. Maximal degree in co-relation 63486. Up to 5818 conditions per place. [2024-06-14 13:02:28,941 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 321 selfloop transitions, 160 changer transitions 0/484 dead transitions. [2024-06-14 13:02:28,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 484 transitions, 8944 flow [2024-06-14 13:02:28,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:02:28,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:02:28,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:02:28,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-14 13:02:28,943 INFO L175 Difference]: Start difference. First operand has 308 places, 441 transitions, 7133 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:02:28,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 484 transitions, 8944 flow [2024-06-14 13:02:30,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 484 transitions, 8801 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-14 13:02:30,801 INFO L231 Difference]: Finished difference. Result has 312 places, 450 transitions, 7557 flow [2024-06-14 13:02:30,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6994, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7557, PETRI_PLACES=312, PETRI_TRANSITIONS=450} [2024-06-14 13:02:30,802 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 268 predicate places. [2024-06-14 13:02:30,802 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 450 transitions, 7557 flow [2024-06-14 13:02:30,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:30,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:30,803 INFO 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] [2024-06-14 13:02:30,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 13:02:30,803 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)] === [2024-06-14 13:02:30,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:30,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1727190717, now seen corresponding path program 1 times [2024-06-14 13:02:30,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:30,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962261073] [2024-06-14 13:02:30,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:30,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:30,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:33,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:33,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962261073] [2024-06-14 13:02:33,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962261073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:33,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:33,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:02:33,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264668260] [2024-06-14 13:02:33,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:33,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:02:33,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:33,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:02:33,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:02:33,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:02:33,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 450 transitions, 7557 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:33,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:33,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:02:33,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:35,823 INFO L124 PetriNetUnfolderBase]: 4356/6701 cut-off events. [2024-06-14 13:02:35,824 INFO L125 PetriNetUnfolderBase]: For 819622/819628 co-relation queries the response was YES. [2024-06-14 13:02:35,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64300 conditions, 6701 events. 4356/6701 cut-off events. For 819622/819628 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 38467 event pairs, 995 based on Foata normal form. 6/6700 useless extension candidates. Maximal degree in co-relation 64145. Up to 6359 conditions per place. [2024-06-14 13:02:35,920 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 376 selfloop transitions, 104 changer transitions 0/483 dead transitions. [2024-06-14 13:02:35,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 483 transitions, 9047 flow [2024-06-14 13:02:35,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:02:35,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:02:35,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 13:02:35,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-14 13:02:35,922 INFO L175 Difference]: Start difference. First operand has 312 places, 450 transitions, 7557 flow. Second operand 8 states and 131 transitions. [2024-06-14 13:02:35,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 483 transitions, 9047 flow [2024-06-14 13:02:37,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 483 transitions, 8749 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-14 13:02:37,734 INFO L231 Difference]: Finished difference. Result has 316 places, 455 transitions, 7594 flow [2024-06-14 13:02:37,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7269, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7594, PETRI_PLACES=316, PETRI_TRANSITIONS=455} [2024-06-14 13:02:37,735 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 272 predicate places. [2024-06-14 13:02:37,735 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 455 transitions, 7594 flow [2024-06-14 13:02:37,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:37,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:37,735 INFO 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] [2024-06-14 13:02:37,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 13:02:37,735 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)] === [2024-06-14 13:02:37,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:37,736 INFO L85 PathProgramCache]: Analyzing trace with hash -319217311, now seen corresponding path program 2 times [2024-06-14 13:02:37,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:37,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028360981] [2024-06-14 13:02:37,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:37,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:37,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:39,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:39,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028360981] [2024-06-14 13:02:39,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028360981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:39,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:39,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:02:39,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838332118] [2024-06-14 13:02:39,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:39,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:02:39,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:39,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:02:39,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:02:39,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:02:39,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 455 transitions, 7594 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:39,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:39,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:02:39,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:42,421 INFO L124 PetriNetUnfolderBase]: 4398/6760 cut-off events. [2024-06-14 13:02:42,422 INFO L125 PetriNetUnfolderBase]: For 855124/855130 co-relation queries the response was YES. [2024-06-14 13:02:42,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64961 conditions, 6760 events. 4398/6760 cut-off events. For 855124/855130 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 38755 event pairs, 996 based on Foata normal form. 6/6759 useless extension candidates. Maximal degree in co-relation 64805. Up to 5854 conditions per place. [2024-06-14 13:02:42,509 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 318 selfloop transitions, 171 changer transitions 0/492 dead transitions. [2024-06-14 13:02:42,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 492 transitions, 9343 flow [2024-06-14 13:02:42,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:02:42,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:02:42,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:02:42,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-14 13:02:42,510 INFO L175 Difference]: Start difference. First operand has 316 places, 455 transitions, 7594 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:02:42,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 492 transitions, 9343 flow [2024-06-14 13:02:44,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 492 transitions, 9157 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 13:02:44,463 INFO L231 Difference]: Finished difference. Result has 320 places, 461 transitions, 7913 flow [2024-06-14 13:02:44,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7408, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7913, PETRI_PLACES=320, PETRI_TRANSITIONS=461} [2024-06-14 13:02:44,464 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 276 predicate places. [2024-06-14 13:02:44,464 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 461 transitions, 7913 flow [2024-06-14 13:02:44,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:44,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:44,464 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] [2024-06-14 13:02:44,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 13:02:44,465 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)] === [2024-06-14 13:02:44,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:44,465 INFO L85 PathProgramCache]: Analyzing trace with hash -531080893, now seen corresponding path program 2 times [2024-06-14 13:02:44,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:44,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649415819] [2024-06-14 13:02:44,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:44,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:46,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:46,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649415819] [2024-06-14 13:02:46,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649415819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:46,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:46,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:02:46,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420948437] [2024-06-14 13:02:46,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:46,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:02:46,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:46,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:02:46,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:02:46,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:02:46,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 461 transitions, 7913 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:46,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:46,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:02:46,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:49,366 INFO L124 PetriNetUnfolderBase]: 4408/6774 cut-off events. [2024-06-14 13:02:49,367 INFO L125 PetriNetUnfolderBase]: For 876911/876917 co-relation queries the response was YES. [2024-06-14 13:02:49,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65805 conditions, 6774 events. 4408/6774 cut-off events. For 876911/876917 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 38876 event pairs, 1003 based on Foata normal form. 6/6773 useless extension candidates. Maximal degree in co-relation 65647. Up to 6427 conditions per place. [2024-06-14 13:02:49,450 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 377 selfloop transitions, 112 changer transitions 0/492 dead transitions. [2024-06-14 13:02:49,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 492 transitions, 9428 flow [2024-06-14 13:02:49,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:02:49,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:02:49,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-14 13:02:49,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36175710594315247 [2024-06-14 13:02:49,452 INFO L175 Difference]: Start difference. First operand has 320 places, 461 transitions, 7913 flow. Second operand 9 states and 140 transitions. [2024-06-14 13:02:49,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 492 transitions, 9428 flow [2024-06-14 13:02:51,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 492 transitions, 9089 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-14 13:02:51,606 INFO L231 Difference]: Finished difference. Result has 325 places, 466 transitions, 7926 flow [2024-06-14 13:02:51,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7580, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7926, PETRI_PLACES=325, PETRI_TRANSITIONS=466} [2024-06-14 13:02:51,606 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 281 predicate places. [2024-06-14 13:02:51,607 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 466 transitions, 7926 flow [2024-06-14 13:02:51,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:51,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:51,607 INFO 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] [2024-06-14 13:02:51,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 13:02:51,607 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)] === [2024-06-14 13:02:51,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:51,608 INFO L85 PathProgramCache]: Analyzing trace with hash 748409669, now seen corresponding path program 3 times [2024-06-14 13:02:51,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:51,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222011072] [2024-06-14 13:02:51,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:51,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:54,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:54,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:54,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222011072] [2024-06-14 13:02:54,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222011072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:54,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:54,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:02:54,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023183914] [2024-06-14 13:02:54,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:54,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:02:54,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:54,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:02:54,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:02:54,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:02:54,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 466 transitions, 7926 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:54,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:54,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:02:54,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:56,812 INFO L124 PetriNetUnfolderBase]: 4402/6766 cut-off events. [2024-06-14 13:02:56,812 INFO L125 PetriNetUnfolderBase]: For 887222/887228 co-relation queries the response was YES. [2024-06-14 13:02:56,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65161 conditions, 6766 events. 4402/6766 cut-off events. For 887222/887228 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 38828 event pairs, 997 based on Foata normal form. 6/6765 useless extension candidates. Maximal degree in co-relation 65002. Up to 5857 conditions per place. [2024-06-14 13:02:56,896 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 324 selfloop transitions, 171 changer transitions 0/498 dead transitions. [2024-06-14 13:02:56,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 498 transitions, 9551 flow [2024-06-14 13:02:56,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:02:56,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:02:56,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:02:56,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-14 13:02:56,898 INFO L175 Difference]: Start difference. First operand has 325 places, 466 transitions, 7926 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:02:56,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 498 transitions, 9551 flow [2024-06-14 13:02:58,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 498 transitions, 9325 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-14 13:02:58,636 INFO L231 Difference]: Finished difference. Result has 328 places, 466 transitions, 8048 flow [2024-06-14 13:02:58,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7700, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8048, PETRI_PLACES=328, PETRI_TRANSITIONS=466} [2024-06-14 13:02:58,637 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 284 predicate places. [2024-06-14 13:02:58,637 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 466 transitions, 8048 flow [2024-06-14 13:02:58,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:58,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:58,637 INFO 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] [2024-06-14 13:02:58,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 13:02:58,637 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)] === [2024-06-14 13:02:58,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:58,638 INFO L85 PathProgramCache]: Analyzing trace with hash 344563899, now seen corresponding path program 5 times [2024-06-14 13:02:58,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:58,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698687560] [2024-06-14 13:02:58,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:58,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:00,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:00,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:00,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698687560] [2024-06-14 13:03:00,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698687560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:00,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:00,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:03:00,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422520961] [2024-06-14 13:03:00,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:00,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:03:00,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:00,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:03:00,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:03:00,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:03:00,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 466 transitions, 8048 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:00,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:00,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:03:00,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:03,244 INFO L124 PetriNetUnfolderBase]: 4407/6773 cut-off events. [2024-06-14 13:03:03,245 INFO L125 PetriNetUnfolderBase]: For 904917/904923 co-relation queries the response was YES. [2024-06-14 13:03:03,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65878 conditions, 6773 events. 4407/6773 cut-off events. For 904917/904923 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 38905 event pairs, 1006 based on Foata normal form. 5/6771 useless extension candidates. Maximal degree in co-relation 65717. Up to 6423 conditions per place. [2024-06-14 13:03:03,362 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 374 selfloop transitions, 115 changer transitions 0/492 dead transitions. [2024-06-14 13:03:03,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 492 transitions, 9494 flow [2024-06-14 13:03:03,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:03:03,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:03:03,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 13:03:03,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 13:03:03,364 INFO L175 Difference]: Start difference. First operand has 328 places, 466 transitions, 8048 flow. Second operand 8 states and 128 transitions. [2024-06-14 13:03:03,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 492 transitions, 9494 flow [2024-06-14 13:03:05,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 492 transitions, 9153 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 13:03:05,317 INFO L231 Difference]: Finished difference. Result has 331 places, 469 transitions, 8008 flow [2024-06-14 13:03:05,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7707, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8008, PETRI_PLACES=331, PETRI_TRANSITIONS=469} [2024-06-14 13:03:05,318 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 287 predicate places. [2024-06-14 13:03:05,318 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 469 transitions, 8008 flow [2024-06-14 13:03:05,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:05,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:05,318 INFO 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] [2024-06-14 13:03:05,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 13:03:05,319 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)] === [2024-06-14 13:03:05,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:05,319 INFO L85 PathProgramCache]: Analyzing trace with hash -319344163, now seen corresponding path program 6 times [2024-06-14 13:03:05,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:05,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241732600] [2024-06-14 13:03:05,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:05,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:05,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:07,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:07,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241732600] [2024-06-14 13:03:07,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241732600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:07,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:07,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:03:07,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730321596] [2024-06-14 13:03:07,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:07,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:03:07,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:07,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:03:07,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:03:07,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:03:07,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 469 transitions, 8008 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:07,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:07,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:03:07,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:10,118 INFO L124 PetriNetUnfolderBase]: 4412/6775 cut-off events. [2024-06-14 13:03:10,118 INFO L125 PetriNetUnfolderBase]: For 918418/918418 co-relation queries the response was YES. [2024-06-14 13:03:10,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65700 conditions, 6775 events. 4412/6775 cut-off events. For 918418/918418 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 38865 event pairs, 935 based on Foata normal form. 1/6774 useless extension candidates. Maximal degree in co-relation 65538. Up to 6711 conditions per place. [2024-06-14 13:03:10,220 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 465 selfloop transitions, 25 changer transitions 0/493 dead transitions. [2024-06-14 13:03:10,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 493 transitions, 9098 flow [2024-06-14 13:03:10,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:03:10,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:03:10,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2024-06-14 13:03:10,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3372093023255814 [2024-06-14 13:03:10,222 INFO L175 Difference]: Start difference. First operand has 331 places, 469 transitions, 8008 flow. Second operand 8 states and 116 transitions. [2024-06-14 13:03:10,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 493 transitions, 9098 flow [2024-06-14 13:03:12,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 493 transitions, 8834 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 13:03:12,416 INFO L231 Difference]: Finished difference. Result has 333 places, 472 transitions, 7856 flow [2024-06-14 13:03:12,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7744, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7856, PETRI_PLACES=333, PETRI_TRANSITIONS=472} [2024-06-14 13:03:12,416 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 289 predicate places. [2024-06-14 13:03:12,416 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 472 transitions, 7856 flow [2024-06-14 13:03:12,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:12,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:12,417 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] [2024-06-14 13:03:12,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 13:03:12,417 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)] === [2024-06-14 13:03:12,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:12,417 INFO L85 PathProgramCache]: Analyzing trace with hash 748642851, now seen corresponding path program 2 times [2024-06-14 13:03:12,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:12,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386484984] [2024-06-14 13:03:12,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:12,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:12,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:14,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:14,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:14,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386484984] [2024-06-14 13:03:14,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386484984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:14,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:14,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:03:14,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401811500] [2024-06-14 13:03:14,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:14,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:03:14,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:14,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:03:14,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:03:14,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:03:14,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 472 transitions, 7856 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:14,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:14,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:03:14,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:16,706 INFO L124 PetriNetUnfolderBase]: 4437/6810 cut-off events. [2024-06-14 13:03:16,706 INFO L125 PetriNetUnfolderBase]: For 948288/948288 co-relation queries the response was YES. [2024-06-14 13:03:16,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66075 conditions, 6810 events. 4437/6810 cut-off events. For 948288/948288 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 39068 event pairs, 954 based on Foata normal form. 3/6811 useless extension candidates. Maximal degree in co-relation 65912. Up to 6704 conditions per place. [2024-06-14 13:03:16,811 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 452 selfloop transitions, 51 changer transitions 0/506 dead transitions. [2024-06-14 13:03:16,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 506 transitions, 9324 flow [2024-06-14 13:03:16,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:03:16,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:03:16,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-14 13:03:16,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3462532299741602 [2024-06-14 13:03:16,813 INFO L175 Difference]: Start difference. First operand has 333 places, 472 transitions, 7856 flow. Second operand 9 states and 134 transitions. [2024-06-14 13:03:16,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 506 transitions, 9324 flow [2024-06-14 13:03:19,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 506 transitions, 9240 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 13:03:19,504 INFO L231 Difference]: Finished difference. Result has 337 places, 481 transitions, 8122 flow [2024-06-14 13:03:19,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7772, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8122, PETRI_PLACES=337, PETRI_TRANSITIONS=481} [2024-06-14 13:03:19,504 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 293 predicate places. [2024-06-14 13:03:19,504 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 481 transitions, 8122 flow [2024-06-14 13:03:19,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:19,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:19,505 INFO 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] [2024-06-14 13:03:19,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 13:03:19,505 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)] === [2024-06-14 13:03:19,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:19,505 INFO L85 PathProgramCache]: Analyzing trace with hash 748286661, now seen corresponding path program 3 times [2024-06-14 13:03:19,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:19,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128682717] [2024-06-14 13:03:19,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:19,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:19,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:21,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:21,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128682717] [2024-06-14 13:03:21,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128682717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:21,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:21,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:03:21,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650368091] [2024-06-14 13:03:21,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:21,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:03:21,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:21,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:03:21,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:03:21,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:03:21,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 481 transitions, 8122 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:21,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:21,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:03:21,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:24,198 INFO L124 PetriNetUnfolderBase]: 4447/6824 cut-off events. [2024-06-14 13:03:24,198 INFO L125 PetriNetUnfolderBase]: For 967286/967286 co-relation queries the response was YES. [2024-06-14 13:03:24,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67021 conditions, 6824 events. 4447/6824 cut-off events. For 967286/967286 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 39157 event pairs, 955 based on Foata normal form. 2/6824 useless extension candidates. Maximal degree in co-relation 66856. Up to 6718 conditions per place. [2024-06-14 13:03:24,294 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 460 selfloop transitions, 48 changer transitions 0/511 dead transitions. [2024-06-14 13:03:24,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 511 transitions, 9305 flow [2024-06-14 13:03:24,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:03:24,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:03:24,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 145 transitions. [2024-06-14 13:03:24,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3372093023255814 [2024-06-14 13:03:24,296 INFO L175 Difference]: Start difference. First operand has 337 places, 481 transitions, 8122 flow. Second operand 10 states and 145 transitions. [2024-06-14 13:03:24,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 511 transitions, 9305 flow [2024-06-14 13:03:26,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 511 transitions, 9098 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-14 13:03:26,366 INFO L231 Difference]: Finished difference. Result has 341 places, 484 transitions, 8098 flow [2024-06-14 13:03:26,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7915, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8098, PETRI_PLACES=341, PETRI_TRANSITIONS=484} [2024-06-14 13:03:26,367 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 297 predicate places. [2024-06-14 13:03:26,367 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 484 transitions, 8098 flow [2024-06-14 13:03:26,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:26,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:26,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:26,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 13:03:26,368 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)] === [2024-06-14 13:03:26,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:26,368 INFO L85 PathProgramCache]: Analyzing trace with hash -319347139, now seen corresponding path program 4 times [2024-06-14 13:03:26,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:26,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563245480] [2024-06-14 13:03:26,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:26,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:28,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:28,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563245480] [2024-06-14 13:03:28,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563245480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:28,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:28,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:03:28,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618927904] [2024-06-14 13:03:28,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:28,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:03:28,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:28,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:03:28,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:03:28,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:03:28,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 484 transitions, 8098 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:28,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:28,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:03:28,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:30,971 INFO L124 PetriNetUnfolderBase]: 4455/6836 cut-off events. [2024-06-14 13:03:30,971 INFO L125 PetriNetUnfolderBase]: For 986366/986366 co-relation queries the response was YES. [2024-06-14 13:03:31,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67166 conditions, 6836 events. 4455/6836 cut-off events. For 986366/986366 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 39232 event pairs, 952 based on Foata normal form. 2/6836 useless extension candidates. Maximal degree in co-relation 67000. Up to 6766 conditions per place. [2024-06-14 13:03:31,081 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 479 selfloop transitions, 27 changer transitions 0/509 dead transitions. [2024-06-14 13:03:31,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 509 transitions, 9212 flow [2024-06-14 13:03:31,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:03:31,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:03:31,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 126 transitions. [2024-06-14 13:03:31,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32558139534883723 [2024-06-14 13:03:31,083 INFO L175 Difference]: Start difference. First operand has 341 places, 484 transitions, 8098 flow. Second operand 9 states and 126 transitions. [2024-06-14 13:03:31,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 509 transitions, 9212 flow [2024-06-14 13:03:33,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 509 transitions, 9072 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-14 13:03:33,405 INFO L231 Difference]: Finished difference. Result has 343 places, 486 transitions, 8059 flow [2024-06-14 13:03:33,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7958, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8059, PETRI_PLACES=343, PETRI_TRANSITIONS=486} [2024-06-14 13:03:33,406 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-14 13:03:33,406 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 486 transitions, 8059 flow [2024-06-14 13:03:33,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:33,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:33,406 INFO 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] [2024-06-14 13:03:33,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 13:03:33,406 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)] === [2024-06-14 13:03:33,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:33,407 INFO L85 PathProgramCache]: Analyzing trace with hash 748655747, now seen corresponding path program 1 times [2024-06-14 13:03:33,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:33,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340521262] [2024-06-14 13:03:33,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:33,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:33,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:35,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:35,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:35,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340521262] [2024-06-14 13:03:35,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340521262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:35,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:35,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:03:35,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417917573] [2024-06-14 13:03:35,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:35,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:03:35,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:35,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:03:35,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:03:35,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:03:35,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 486 transitions, 8059 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:35,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:35,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:03:35,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:38,383 INFO L124 PetriNetUnfolderBase]: 4463/6848 cut-off events. [2024-06-14 13:03:38,383 INFO L125 PetriNetUnfolderBase]: For 1006908/1006908 co-relation queries the response was YES. [2024-06-14 13:03:38,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67407 conditions, 6848 events. 4463/6848 cut-off events. For 1006908/1006908 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 39323 event pairs, 952 based on Foata normal form. 2/6848 useless extension candidates. Maximal degree in co-relation 67240. Up to 6758 conditions per place. [2024-06-14 13:03:38,477 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 468 selfloop transitions, 39 changer transitions 0/510 dead transitions. [2024-06-14 13:03:38,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 510 transitions, 9198 flow [2024-06-14 13:03:38,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:03:38,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:03:38,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-14 13:03:38,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35174418604651164 [2024-06-14 13:03:38,478 INFO L175 Difference]: Start difference. First operand has 343 places, 486 transitions, 8059 flow. Second operand 8 states and 121 transitions. [2024-06-14 13:03:38,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 510 transitions, 9198 flow [2024-06-14 13:03:40,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 510 transitions, 9117 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 13:03:40,888 INFO L231 Difference]: Finished difference. Result has 344 places, 488 transitions, 8128 flow [2024-06-14 13:03:40,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7978, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8128, PETRI_PLACES=344, PETRI_TRANSITIONS=488} [2024-06-14 13:03:40,889 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-14 13:03:40,889 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 488 transitions, 8128 flow [2024-06-14 13:03:40,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:40,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:40,890 INFO 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] [2024-06-14 13:03:40,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 13:03:40,890 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)] === [2024-06-14 13:03:40,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:40,890 INFO L85 PathProgramCache]: Analyzing trace with hash 748655313, now seen corresponding path program 1 times [2024-06-14 13:03:40,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:40,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084167928] [2024-06-14 13:03:40,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:40,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:40,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:43,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:43,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:43,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084167928] [2024-06-14 13:03:43,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084167928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:43,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:43,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:03:43,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837263447] [2024-06-14 13:03:43,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:43,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:03:43,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:43,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:03:43,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:03:43,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:03:43,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 488 transitions, 8128 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:43,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:43,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:03:43,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:45,605 INFO L124 PetriNetUnfolderBase]: 4458/6841 cut-off events. [2024-06-14 13:03:45,605 INFO L125 PetriNetUnfolderBase]: For 1017305/1017305 co-relation queries the response was YES. [2024-06-14 13:03:45,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67560 conditions, 6841 events. 4458/6841 cut-off events. For 1017305/1017305 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 39263 event pairs, 958 based on Foata normal form. 1/6840 useless extension candidates. Maximal degree in co-relation 67392. Up to 6748 conditions per place. [2024-06-14 13:03:45,722 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 462 selfloop transitions, 45 changer transitions 0/510 dead transitions. [2024-06-14 13:03:45,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 510 transitions, 9207 flow [2024-06-14 13:03:45,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:03:45,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:03:45,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-14 13:03:45,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3546511627906977 [2024-06-14 13:03:45,724 INFO L175 Difference]: Start difference. First operand has 344 places, 488 transitions, 8128 flow. Second operand 8 states and 122 transitions. [2024-06-14 13:03:45,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 510 transitions, 9207 flow [2024-06-14 13:03:48,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 510 transitions, 9042 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-14 13:03:48,507 INFO L231 Difference]: Finished difference. Result has 346 places, 488 transitions, 8065 flow [2024-06-14 13:03:48,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7963, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8065, PETRI_PLACES=346, PETRI_TRANSITIONS=488} [2024-06-14 13:03:48,508 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 302 predicate places. [2024-06-14 13:03:48,508 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 488 transitions, 8065 flow [2024-06-14 13:03:48,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:48,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:48,508 INFO 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] [2024-06-14 13:03:48,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 13:03:48,509 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)] === [2024-06-14 13:03:48,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:48,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1003265915, now seen corresponding path program 7 times [2024-06-14 13:03:48,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:48,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32929515] [2024-06-14 13:03:48,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:48,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:48,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:50,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:50,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:50,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32929515] [2024-06-14 13:03:50,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32929515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:50,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:50,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:03:50,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999880038] [2024-06-14 13:03:50,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:50,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:03:50,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:50,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:03:50,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:03:50,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:03:50,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 488 transitions, 8065 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:50,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:50,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:03:50,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:53,093 INFO L124 PetriNetUnfolderBase]: 4489/6886 cut-off events. [2024-06-14 13:03:53,093 INFO L125 PetriNetUnfolderBase]: For 1057334/1057353 co-relation queries the response was YES. [2024-06-14 13:03:53,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68239 conditions, 6886 events. 4489/6886 cut-off events. For 1057334/1057353 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 39616 event pairs, 947 based on Foata normal form. 21/6903 useless extension candidates. Maximal degree in co-relation 68070. Up to 6438 conditions per place. [2024-06-14 13:03:53,196 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 407 selfloop transitions, 120 changer transitions 0/530 dead transitions. [2024-06-14 13:03:53,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 530 transitions, 10000 flow [2024-06-14 13:03:53,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:03:53,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:03:53,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 13:03:53,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-14 13:03:53,198 INFO L175 Difference]: Start difference. First operand has 346 places, 488 transitions, 8065 flow. Second operand 8 states and 135 transitions. [2024-06-14 13:03:53,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 530 transitions, 10000 flow [2024-06-14 13:03:55,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 530 transitions, 9896 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 13:03:55,608 INFO L231 Difference]: Finished difference. Result has 347 places, 499 transitions, 8488 flow [2024-06-14 13:03:55,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7967, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8488, PETRI_PLACES=347, PETRI_TRANSITIONS=499} [2024-06-14 13:03:55,609 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 303 predicate places. [2024-06-14 13:03:55,609 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 499 transitions, 8488 flow [2024-06-14 13:03:55,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:55,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:55,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:55,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 13:03:55,609 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)] === [2024-06-14 13:03:55,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:55,610 INFO L85 PathProgramCache]: Analyzing trace with hash -2071656461, now seen corresponding path program 4 times [2024-06-14 13:03:55,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:55,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674876223] [2024-06-14 13:03:55,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:55,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:58,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:58,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:58,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674876223] [2024-06-14 13:03:58,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674876223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:58,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:58,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:03:58,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93625260] [2024-06-14 13:03:58,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:58,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:03:58,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:58,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:03:58,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:03:58,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:03:58,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 499 transitions, 8488 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:58,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:58,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:03:58,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:00,961 INFO L124 PetriNetUnfolderBase]: 4471/6862 cut-off events. [2024-06-14 13:04:00,961 INFO L125 PetriNetUnfolderBase]: For 1051217/1051236 co-relation queries the response was YES. [2024-06-14 13:04:01,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68485 conditions, 6862 events. 4471/6862 cut-off events. For 1051217/1051236 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 39448 event pairs, 910 based on Foata normal form. 24/6882 useless extension candidates. Maximal degree in co-relation 68315. Up to 5969 conditions per place. [2024-06-14 13:04:01,238 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 364 selfloop transitions, 163 changer transitions 0/530 dead transitions. [2024-06-14 13:04:01,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 530 transitions, 10033 flow [2024-06-14 13:04:01,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:01,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:01,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 13:04:01,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:04:01,240 INFO L175 Difference]: Start difference. First operand has 347 places, 499 transitions, 8488 flow. Second operand 8 states and 136 transitions. [2024-06-14 13:04:01,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 530 transitions, 10033 flow [2024-06-14 13:04:03,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 530 transitions, 9758 flow, removed 76 selfloop flow, removed 4 redundant places. [2024-06-14 13:04:03,596 INFO L231 Difference]: Finished difference. Result has 351 places, 499 transitions, 8547 flow [2024-06-14 13:04:03,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8213, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8547, PETRI_PLACES=351, PETRI_TRANSITIONS=499} [2024-06-14 13:04:03,596 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 307 predicate places. [2024-06-14 13:04:03,596 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 499 transitions, 8547 flow [2024-06-14 13:04:03,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:03,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:03,597 INFO 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] [2024-06-14 13:04:03,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 13:04:03,597 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)] === [2024-06-14 13:04:03,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:03,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2071656833, now seen corresponding path program 8 times [2024-06-14 13:04:03,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:03,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483962726] [2024-06-14 13:04:03,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:03,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:03,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:05,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:05,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483962726] [2024-06-14 13:04:05,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483962726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:05,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:05,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:05,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505803197] [2024-06-14 13:04:05,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:05,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:05,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:05,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:05,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:05,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:04:05,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 499 transitions, 8547 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:05,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:05,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:04:05,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:08,420 INFO L124 PetriNetUnfolderBase]: 4486/6883 cut-off events. [2024-06-14 13:04:08,420 INFO L125 PetriNetUnfolderBase]: For 1060591/1060610 co-relation queries the response was YES. [2024-06-14 13:04:08,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69249 conditions, 6883 events. 4486/6883 cut-off events. For 1060591/1060610 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 39606 event pairs, 933 based on Foata normal form. 21/6900 useless extension candidates. Maximal degree in co-relation 69077. Up to 6633 conditions per place. [2024-06-14 13:04:08,540 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 456 selfloop transitions, 73 changer transitions 0/532 dead transitions. [2024-06-14 13:04:08,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 532 transitions, 10178 flow [2024-06-14 13:04:08,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:08,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:08,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 13:04:08,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36627906976744184 [2024-06-14 13:04:08,542 INFO L175 Difference]: Start difference. First operand has 351 places, 499 transitions, 8547 flow. Second operand 8 states and 126 transitions. [2024-06-14 13:04:08,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 532 transitions, 10178 flow [2024-06-14 13:04:11,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 532 transitions, 9579 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-14 13:04:11,389 INFO L231 Difference]: Finished difference. Result has 349 places, 506 transitions, 8231 flow [2024-06-14 13:04:11,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7948, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8231, PETRI_PLACES=349, PETRI_TRANSITIONS=506} [2024-06-14 13:04:11,390 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 305 predicate places. [2024-06-14 13:04:11,390 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 506 transitions, 8231 flow [2024-06-14 13:04:11,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:11,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:11,390 INFO 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] [2024-06-14 13:04:11,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 13:04:11,390 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)] === [2024-06-14 13:04:11,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:11,391 INFO L85 PathProgramCache]: Analyzing trace with hash -2071656647, now seen corresponding path program 3 times [2024-06-14 13:04:11,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:11,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594505728] [2024-06-14 13:04:11,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:11,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:11,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:13,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:13,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:13,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594505728] [2024-06-14 13:04:13,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594505728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:13,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:13,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:13,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311088490] [2024-06-14 13:04:13,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:13,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:13,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:13,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:13,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:13,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:04:13,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 506 transitions, 8231 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:13,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:13,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:04:13,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:16,398 INFO L124 PetriNetUnfolderBase]: 4480/6875 cut-off events. [2024-06-14 13:04:16,399 INFO L125 PetriNetUnfolderBase]: For 1057698/1057717 co-relation queries the response was YES. [2024-06-14 13:04:16,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68515 conditions, 6875 events. 4480/6875 cut-off events. For 1057698/1057717 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 39619 event pairs, 932 based on Foata normal form. 20/6891 useless extension candidates. Maximal degree in co-relation 68342. Up to 6534 conditions per place. [2024-06-14 13:04:16,491 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 423 selfloop transitions, 104 changer transitions 0/530 dead transitions. [2024-06-14 13:04:16,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 530 transitions, 9552 flow [2024-06-14 13:04:16,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:16,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:16,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 13:04:16,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-14 13:04:16,493 INFO L175 Difference]: Start difference. First operand has 349 places, 506 transitions, 8231 flow. Second operand 8 states and 127 transitions. [2024-06-14 13:04:16,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 530 transitions, 9552 flow [2024-06-14 13:04:19,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 530 transitions, 9272 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-14 13:04:19,752 INFO L231 Difference]: Finished difference. Result has 352 places, 506 transitions, 8168 flow [2024-06-14 13:04:19,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7952, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8168, PETRI_PLACES=352, PETRI_TRANSITIONS=506} [2024-06-14 13:04:19,753 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 308 predicate places. [2024-06-14 13:04:19,753 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 506 transitions, 8168 flow [2024-06-14 13:04:19,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:19,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:19,753 INFO 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] [2024-06-14 13:04:19,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 13:04:19,754 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)] === [2024-06-14 13:04:19,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:19,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1832447627, now seen corresponding path program 4 times [2024-06-14 13:04:19,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:19,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180990995] [2024-06-14 13:04:19,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:19,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:22,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:22,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:22,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180990995] [2024-06-14 13:04:22,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180990995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:22,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:22,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:22,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231650960] [2024-06-14 13:04:22,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:22,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:22,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:22,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:22,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:22,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:04:22,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 506 transitions, 8168 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:22,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:22,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:04:22,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:24,584 INFO L124 PetriNetUnfolderBase]: 4474/6867 cut-off events. [2024-06-14 13:04:24,584 INFO L125 PetriNetUnfolderBase]: For 1067225/1067244 co-relation queries the response was YES. [2024-06-14 13:04:24,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68399 conditions, 6867 events. 4474/6867 cut-off events. For 1067225/1067244 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 39552 event pairs, 939 based on Foata normal form. 20/6883 useless extension candidates. Maximal degree in co-relation 68225. Up to 6529 conditions per place. [2024-06-14 13:04:24,689 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 419 selfloop transitions, 108 changer transitions 0/530 dead transitions. [2024-06-14 13:04:24,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 530 transitions, 9301 flow [2024-06-14 13:04:24,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:24,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:24,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 13:04:24,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36627906976744184 [2024-06-14 13:04:24,690 INFO L175 Difference]: Start difference. First operand has 352 places, 506 transitions, 8168 flow. Second operand 8 states and 126 transitions. [2024-06-14 13:04:24,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 530 transitions, 9301 flow [2024-06-14 13:04:27,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 530 transitions, 9058 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 13:04:27,195 INFO L231 Difference]: Finished difference. Result has 353 places, 506 transitions, 8150 flow [2024-06-14 13:04:27,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7925, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8150, PETRI_PLACES=353, PETRI_TRANSITIONS=506} [2024-06-14 13:04:27,195 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 309 predicate places. [2024-06-14 13:04:27,195 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 506 transitions, 8150 flow [2024-06-14 13:04:27,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:27,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:27,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:27,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 13:04:27,196 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)] === [2024-06-14 13:04:27,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:27,197 INFO L85 PathProgramCache]: Analyzing trace with hash -2041254459, now seen corresponding path program 5 times [2024-06-14 13:04:27,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:27,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971899465] [2024-06-14 13:04:27,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:27,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:27,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:29,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:29,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971899465] [2024-06-14 13:04:29,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971899465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:29,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:29,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:29,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070645564] [2024-06-14 13:04:29,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:29,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:29,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:29,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:29,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:29,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:04:29,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 506 transitions, 8150 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:29,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:29,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:04:29,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:31,938 INFO L124 PetriNetUnfolderBase]: 4488/6886 cut-off events. [2024-06-14 13:04:31,938 INFO L125 PetriNetUnfolderBase]: For 1097668/1097668 co-relation queries the response was YES. [2024-06-14 13:04:32,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68617 conditions, 6886 events. 4488/6886 cut-off events. For 1097668/1097668 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 39630 event pairs, 889 based on Foata normal form. 6/6890 useless extension candidates. Maximal degree in co-relation 68443. Up to 6633 conditions per place. [2024-06-14 13:04:32,047 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 480 selfloop transitions, 57 changer transitions 0/540 dead transitions. [2024-06-14 13:04:32,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 540 transitions, 9833 flow [2024-06-14 13:04:32,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:04:32,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:04:32,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-14 13:04:32,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3643410852713178 [2024-06-14 13:04:32,049 INFO L175 Difference]: Start difference. First operand has 353 places, 506 transitions, 8150 flow. Second operand 9 states and 141 transitions. [2024-06-14 13:04:32,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 540 transitions, 9833 flow [2024-06-14 13:04:34,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 540 transitions, 9647 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 13:04:34,815 INFO L231 Difference]: Finished difference. Result has 357 places, 509 transitions, 8168 flow [2024-06-14 13:04:34,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7966, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8168, PETRI_PLACES=357, PETRI_TRANSITIONS=509} [2024-06-14 13:04:34,816 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 313 predicate places. [2024-06-14 13:04:34,816 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 509 transitions, 8168 flow [2024-06-14 13:04:34,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:34,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:34,816 INFO 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] [2024-06-14 13:04:34,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 13:04:34,816 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)] === [2024-06-14 13:04:34,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:34,817 INFO L85 PathProgramCache]: Analyzing trace with hash -2041254831, now seen corresponding path program 9 times [2024-06-14 13:04:34,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:34,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582046336] [2024-06-14 13:04:34,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:34,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:37,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:37,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:37,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582046336] [2024-06-14 13:04:37,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582046336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:37,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:37,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:37,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889329163] [2024-06-14 13:04:37,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:37,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:37,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:37,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:37,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:37,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:04:37,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 509 transitions, 8168 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:37,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:37,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:04:37,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:39,594 INFO L124 PetriNetUnfolderBase]: 4533/6949 cut-off events. [2024-06-14 13:04:39,595 INFO L125 PetriNetUnfolderBase]: For 1135078/1135078 co-relation queries the response was YES. [2024-06-14 13:04:39,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69431 conditions, 6949 events. 4533/6949 cut-off events. For 1135078/1135078 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 40004 event pairs, 908 based on Foata normal form. 9/6956 useless extension candidates. Maximal degree in co-relation 69256. Up to 6843 conditions per place. [2024-06-14 13:04:39,692 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 507 selfloop transitions, 50 changer transitions 0/560 dead transitions. [2024-06-14 13:04:39,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 560 transitions, 9869 flow [2024-06-14 13:04:39,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:04:39,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:04:39,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-14 13:04:39,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34366925064599485 [2024-06-14 13:04:39,693 INFO L175 Difference]: Start difference. First operand has 357 places, 509 transitions, 8168 flow. Second operand 9 states and 133 transitions. [2024-06-14 13:04:39,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 560 transitions, 9869 flow [2024-06-14 13:04:42,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 560 transitions, 9687 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-14 13:04:42,720 INFO L231 Difference]: Finished difference. Result has 363 places, 538 transitions, 8704 flow [2024-06-14 13:04:42,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8002, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8704, PETRI_PLACES=363, PETRI_TRANSITIONS=538} [2024-06-14 13:04:42,720 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 319 predicate places. [2024-06-14 13:04:42,721 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 538 transitions, 8704 flow [2024-06-14 13:04:42,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:42,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:42,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:42,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 13:04:42,721 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)] === [2024-06-14 13:04:42,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:42,721 INFO L85 PathProgramCache]: Analyzing trace with hash 93034139, now seen corresponding path program 10 times [2024-06-14 13:04:42,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:42,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633955147] [2024-06-14 13:04:42,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:42,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:42,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:45,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:45,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:45,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633955147] [2024-06-14 13:04:45,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633955147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:45,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:45,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:45,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332895077] [2024-06-14 13:04:45,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:45,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:45,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:45,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:45,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:45,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:04:45,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 538 transitions, 8704 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:45,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:45,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:04:45,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:47,402 INFO L124 PetriNetUnfolderBase]: 4540/6958 cut-off events. [2024-06-14 13:04:47,402 INFO L125 PetriNetUnfolderBase]: For 1125937/1125937 co-relation queries the response was YES. [2024-06-14 13:04:47,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71044 conditions, 6958 events. 4540/6958 cut-off events. For 1125937/1125937 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 40044 event pairs, 904 based on Foata normal form. 3/6959 useless extension candidates. Maximal degree in co-relation 70864. Up to 6841 conditions per place. [2024-06-14 13:04:47,530 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 531 selfloop transitions, 41 changer transitions 0/575 dead transitions. [2024-06-14 13:04:47,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 575 transitions, 10041 flow [2024-06-14 13:04:47,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:04:47,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:04:47,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 13:04:47,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:04:47,531 INFO L175 Difference]: Start difference. First operand has 363 places, 538 transitions, 8704 flow. Second operand 7 states and 126 transitions. [2024-06-14 13:04:47,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 575 transitions, 10041 flow [2024-06-14 13:04:49,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 575 transitions, 9765 flow, removed 133 selfloop flow, removed 2 redundant places. [2024-06-14 13:04:49,888 INFO L231 Difference]: Finished difference. Result has 368 places, 541 transitions, 8615 flow [2024-06-14 13:04:49,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8428, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8615, PETRI_PLACES=368, PETRI_TRANSITIONS=541} [2024-06-14 13:04:49,889 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 324 predicate places. [2024-06-14 13:04:49,889 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 541 transitions, 8615 flow [2024-06-14 13:04:49,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:49,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:49,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:49,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 13:04:49,890 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)] === [2024-06-14 13:04:49,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:49,890 INFO L85 PathProgramCache]: Analyzing trace with hash -763698961, now seen corresponding path program 6 times [2024-06-14 13:04:49,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:49,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588277860] [2024-06-14 13:04:49,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:49,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:49,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:52,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:52,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:52,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588277860] [2024-06-14 13:04:52,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588277860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:52,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:52,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:52,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419590928] [2024-06-14 13:04:52,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:52,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:52,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:52,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:52,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:52,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:04:52,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 541 transitions, 8615 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:52,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:52,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:04:52,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:54,727 INFO L124 PetriNetUnfolderBase]: 4582/7018 cut-off events. [2024-06-14 13:04:54,728 INFO L125 PetriNetUnfolderBase]: For 1164464/1164467 co-relation queries the response was YES. [2024-06-14 13:04:54,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72252 conditions, 7018 events. 4582/7018 cut-off events. For 1164464/1164467 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 40383 event pairs, 895 based on Foata normal form. 4/7019 useless extension candidates. Maximal degree in co-relation 72070. Up to 6334 conditions per place. [2024-06-14 13:04:54,845 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 433 selfloop transitions, 147 changer transitions 0/583 dead transitions. [2024-06-14 13:04:54,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 583 transitions, 10698 flow [2024-06-14 13:04:54,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:54,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:54,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 13:04:54,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-14 13:04:54,847 INFO L175 Difference]: Start difference. First operand has 368 places, 541 transitions, 8615 flow. Second operand 8 states and 141 transitions. [2024-06-14 13:04:54,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 583 transitions, 10698 flow [2024-06-14 13:04:57,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 583 transitions, 10555 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-14 13:04:57,801 INFO L231 Difference]: Finished difference. Result has 371 places, 547 transitions, 8935 flow [2024-06-14 13:04:57,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8472, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8935, PETRI_PLACES=371, PETRI_TRANSITIONS=547} [2024-06-14 13:04:57,801 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 327 predicate places. [2024-06-14 13:04:57,802 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 547 transitions, 8935 flow [2024-06-14 13:04:57,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:57,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:57,802 INFO 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] [2024-06-14 13:04:57,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 13:04:57,802 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)] === [2024-06-14 13:04:57,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:57,802 INFO L85 PathProgramCache]: Analyzing trace with hash -763936111, now seen corresponding path program 7 times [2024-06-14 13:04:57,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:57,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676915542] [2024-06-14 13:04:57,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:57,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:59,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:59,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:59,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676915542] [2024-06-14 13:04:59,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676915542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:59,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:59,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:59,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884251000] [2024-06-14 13:04:59,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:59,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:59,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:59,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:59,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:59,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:04:59,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 547 transitions, 8935 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:59,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:59,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:04:59,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:02,626 INFO L124 PetriNetUnfolderBase]: 4576/7009 cut-off events. [2024-06-14 13:05:02,626 INFO L125 PetriNetUnfolderBase]: For 1176946/1176949 co-relation queries the response was YES. [2024-06-14 13:05:02,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72626 conditions, 7009 events. 4576/7009 cut-off events. For 1176946/1176949 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 40332 event pairs, 896 based on Foata normal form. 4/7010 useless extension candidates. Maximal degree in co-relation 72443. Up to 6331 conditions per place. [2024-06-14 13:05:02,726 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 436 selfloop transitions, 147 changer transitions 0/586 dead transitions. [2024-06-14 13:05:02,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 586 transitions, 10672 flow [2024-06-14 13:05:02,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:05:02,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:05:02,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 13:05:02,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 13:05:02,728 INFO L175 Difference]: Start difference. First operand has 371 places, 547 transitions, 8935 flow. Second operand 8 states and 143 transitions. [2024-06-14 13:05:02,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 586 transitions, 10672 flow [2024-06-14 13:05:05,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 586 transitions, 10301 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-14 13:05:05,019 INFO L231 Difference]: Finished difference. Result has 374 places, 547 transitions, 8864 flow [2024-06-14 13:05:05,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8564, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8864, PETRI_PLACES=374, PETRI_TRANSITIONS=547} [2024-06-14 13:05:05,019 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 330 predicate places. [2024-06-14 13:05:05,019 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 547 transitions, 8864 flow [2024-06-14 13:05:05,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:05,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:05,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:05,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 13:05:05,020 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)] === [2024-06-14 13:05:05,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:05,020 INFO L85 PathProgramCache]: Analyzing trace with hash -586804963, now seen corresponding path program 11 times [2024-06-14 13:05:05,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:05,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242458546] [2024-06-14 13:05:05,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:05,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:07,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:07,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:07,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242458546] [2024-06-14 13:05:07,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242458546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:07,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:07,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:05:07,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477654027] [2024-06-14 13:05:07,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:07,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:05:07,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:07,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:05:07,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:05:07,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:05:07,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 547 transitions, 8864 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:07,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:07,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:05:07,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:10,134 INFO L124 PetriNetUnfolderBase]: 4638/7095 cut-off events. [2024-06-14 13:05:10,134 INFO L125 PetriNetUnfolderBase]: For 1255367/1255367 co-relation queries the response was YES. [2024-06-14 13:05:10,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73312 conditions, 7095 events. 4638/7095 cut-off events. For 1255367/1255367 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 40780 event pairs, 916 based on Foata normal form. 14/7107 useless extension candidates. Maximal degree in co-relation 73129. Up to 6528 conditions per place. [2024-06-14 13:05:10,446 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 454 selfloop transitions, 152 changer transitions 0/609 dead transitions. [2024-06-14 13:05:10,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 609 transitions, 10602 flow [2024-06-14 13:05:10,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:05:10,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:05:10,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 13:05:10,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 13:05:10,449 INFO L175 Difference]: Start difference. First operand has 374 places, 547 transitions, 8864 flow. Second operand 9 states and 165 transitions. [2024-06-14 13:05:10,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 609 transitions, 10602 flow [2024-06-14 13:05:13,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 609 transitions, 10358 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 13:05:13,166 INFO L231 Difference]: Finished difference. Result has 377 places, 561 transitions, 9326 flow [2024-06-14 13:05:13,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8620, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9326, PETRI_PLACES=377, PETRI_TRANSITIONS=561} [2024-06-14 13:05:13,167 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 333 predicate places. [2024-06-14 13:05:13,167 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 561 transitions, 9326 flow [2024-06-14 13:05:13,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:13,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:13,167 INFO 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] [2024-06-14 13:05:13,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 13:05:13,168 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)] === [2024-06-14 13:05:13,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:13,168 INFO L85 PathProgramCache]: Analyzing trace with hash -586804591, now seen corresponding path program 8 times [2024-06-14 13:05:13,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:13,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060818768] [2024-06-14 13:05:13,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:13,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:13,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:15,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:15,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:15,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060818768] [2024-06-14 13:05:15,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060818768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:15,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:15,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:05:15,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438192827] [2024-06-14 13:05:15,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:15,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:05:15,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:15,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:05:15,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:05:15,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:05:15,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 561 transitions, 9326 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:15,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:15,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:05:15,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:18,487 INFO L124 PetriNetUnfolderBase]: 4620/7071 cut-off events. [2024-06-14 13:05:18,488 INFO L125 PetriNetUnfolderBase]: For 1208593/1208593 co-relation queries the response was YES. [2024-06-14 13:05:18,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73444 conditions, 7071 events. 4620/7071 cut-off events. For 1208593/1208593 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 40677 event pairs, 879 based on Foata normal form. 6/7075 useless extension candidates. Maximal degree in co-relation 73260. Up to 6407 conditions per place. [2024-06-14 13:05:18,620 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 455 selfloop transitions, 147 changer transitions 0/605 dead transitions. [2024-06-14 13:05:18,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 605 transitions, 11125 flow [2024-06-14 13:05:18,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:05:18,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:05:18,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 13:05:18,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-14 13:05:18,621 INFO L175 Difference]: Start difference. First operand has 377 places, 561 transitions, 9326 flow. Second operand 9 states and 161 transitions. [2024-06-14 13:05:18,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 605 transitions, 11125 flow [2024-06-14 13:05:22,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 605 transitions, 10618 flow, removed 125 selfloop flow, removed 7 redundant places. [2024-06-14 13:05:22,551 INFO L231 Difference]: Finished difference. Result has 379 places, 561 transitions, 9131 flow [2024-06-14 13:05:22,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8823, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9131, PETRI_PLACES=379, PETRI_TRANSITIONS=561} [2024-06-14 13:05:22,551 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-14 13:05:22,551 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 561 transitions, 9131 flow [2024-06-14 13:05:22,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:22,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:22,551 INFO 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] [2024-06-14 13:05:22,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 13:05:22,552 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)] === [2024-06-14 13:05:22,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:22,552 INFO L85 PathProgramCache]: Analyzing trace with hash -270737361, now seen corresponding path program 12 times [2024-06-14 13:05:22,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:22,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463928362] [2024-06-14 13:05:22,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:22,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:22,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:24,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:24,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463928362] [2024-06-14 13:05:24,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463928362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:24,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:24,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:05:24,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169238750] [2024-06-14 13:05:24,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:24,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:05:24,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:24,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:05:24,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:05:24,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:05:24,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 561 transitions, 9131 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:24,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:24,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:05:24,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:27,347 INFO L124 PetriNetUnfolderBase]: 4627/7082 cut-off events. [2024-06-14 13:05:27,347 INFO L125 PetriNetUnfolderBase]: For 1182354/1182357 co-relation queries the response was YES. [2024-06-14 13:05:27,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72462 conditions, 7082 events. 4627/7082 cut-off events. For 1182354/1182357 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 40791 event pairs, 915 based on Foata normal form. 5/7084 useless extension candidates. Maximal degree in co-relation 72277. Up to 6724 conditions per place. [2024-06-14 13:05:27,460 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 497 selfloop transitions, 120 changer transitions 0/620 dead transitions. [2024-06-14 13:05:27,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 620 transitions, 10988 flow [2024-06-14 13:05:27,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:05:27,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:05:27,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 13:05:27,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 13:05:27,461 INFO L175 Difference]: Start difference. First operand has 379 places, 561 transitions, 9131 flow. Second operand 8 states and 143 transitions. [2024-06-14 13:05:27,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 620 transitions, 10988 flow [2024-06-14 13:05:30,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 620 transitions, 10409 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-14 13:05:30,361 INFO L231 Difference]: Finished difference. Result has 379 places, 582 transitions, 9459 flow [2024-06-14 13:05:30,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8594, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9459, PETRI_PLACES=379, PETRI_TRANSITIONS=582} [2024-06-14 13:05:30,362 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-14 13:05:30,362 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 582 transitions, 9459 flow [2024-06-14 13:05:30,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:30,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:30,362 INFO 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] [2024-06-14 13:05:30,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 13:05:30,362 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)] === [2024-06-14 13:05:30,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:30,363 INFO L85 PathProgramCache]: Analyzing trace with hash -364193157, now seen corresponding path program 2 times [2024-06-14 13:05:30,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:30,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754719503] [2024-06-14 13:05:30,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:30,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:30,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:32,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:32,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:32,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754719503] [2024-06-14 13:05:32,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754719503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:32,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:32,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:05:32,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249961448] [2024-06-14 13:05:32,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:32,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:05:32,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:32,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:05:32,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:05:32,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:05:32,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 582 transitions, 9459 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:32,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:32,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:05:32,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:35,291 INFO L124 PetriNetUnfolderBase]: 4632/7088 cut-off events. [2024-06-14 13:05:35,291 INFO L125 PetriNetUnfolderBase]: For 1170005/1170005 co-relation queries the response was YES. [2024-06-14 13:05:35,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73020 conditions, 7088 events. 4632/7088 cut-off events. For 1170005/1170005 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 40853 event pairs, 914 based on Foata normal form. 1/7087 useless extension candidates. Maximal degree in co-relation 72832. Up to 6982 conditions per place. [2024-06-14 13:05:35,390 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 571 selfloop transitions, 39 changer transitions 0/613 dead transitions. [2024-06-14 13:05:35,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 613 transitions, 10839 flow [2024-06-14 13:05:35,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:05:35,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:05:35,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-14 13:05:35,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 13:05:35,391 INFO L175 Difference]: Start difference. First operand has 379 places, 582 transitions, 9459 flow. Second operand 6 states and 111 transitions. [2024-06-14 13:05:35,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 613 transitions, 10839 flow [2024-06-14 13:05:38,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 613 transitions, 10688 flow, removed 66 selfloop flow, removed 2 redundant places. [2024-06-14 13:05:38,678 INFO L231 Difference]: Finished difference. Result has 383 places, 585 transitions, 9488 flow [2024-06-14 13:05:38,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9308, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9488, PETRI_PLACES=383, PETRI_TRANSITIONS=585} [2024-06-14 13:05:38,678 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 339 predicate places. [2024-06-14 13:05:38,678 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 585 transitions, 9488 flow [2024-06-14 13:05:38,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:38,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:38,679 INFO 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] [2024-06-14 13:05:38,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 13:05:38,679 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)] === [2024-06-14 13:05:38,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:38,679 INFO L85 PathProgramCache]: Analyzing trace with hash -364192723, now seen corresponding path program 2 times [2024-06-14 13:05:38,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:38,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232627568] [2024-06-14 13:05:38,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:38,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:41,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:41,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232627568] [2024-06-14 13:05:41,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232627568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:41,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:41,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:05:41,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061362060] [2024-06-14 13:05:41,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:41,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:05:41,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:41,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:05:41,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:05:41,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:05:41,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 585 transitions, 9488 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:41,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:41,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:05:41,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:43,476 INFO L124 PetriNetUnfolderBase]: 4640/7100 cut-off events. [2024-06-14 13:05:43,477 INFO L125 PetriNetUnfolderBase]: For 1198096/1198096 co-relation queries the response was YES. [2024-06-14 13:05:43,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73490 conditions, 7100 events. 4640/7100 cut-off events. For 1198096/1198096 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 40906 event pairs, 907 based on Foata normal form. 2/7100 useless extension candidates. Maximal degree in co-relation 73300. Up to 7027 conditions per place. [2024-06-14 13:05:43,605 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 577 selfloop transitions, 27 changer transitions 0/607 dead transitions. [2024-06-14 13:05:43,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 607 transitions, 10821 flow [2024-06-14 13:05:43,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:05:43,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:05:43,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-14 13:05:43,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-14 13:05:43,606 INFO L175 Difference]: Start difference. First operand has 383 places, 585 transitions, 9488 flow. Second operand 6 states and 100 transitions. [2024-06-14 13:05:43,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 607 transitions, 10821 flow [2024-06-14 13:05:47,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 607 transitions, 10716 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-14 13:05:47,773 INFO L231 Difference]: Finished difference. Result has 385 places, 587 transitions, 9513 flow [2024-06-14 13:05:47,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9383, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9513, PETRI_PLACES=385, PETRI_TRANSITIONS=587} [2024-06-14 13:05:47,774 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 341 predicate places. [2024-06-14 13:05:47,774 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 587 transitions, 9513 flow [2024-06-14 13:05:47,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:47,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:47,774 INFO 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] [2024-06-14 13:05:47,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 13:05:47,775 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)] === [2024-06-14 13:05:47,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:47,775 INFO L85 PathProgramCache]: Analyzing trace with hash 93031473, now seen corresponding path program 4 times [2024-06-14 13:05:47,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:47,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71634854] [2024-06-14 13:05:47,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:47,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:50,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:50,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:50,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71634854] [2024-06-14 13:05:50,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71634854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:50,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:50,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:05:50,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916669254] [2024-06-14 13:05:50,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:50,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:05:50,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:50,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:05:50,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:05:50,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:05:50,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 587 transitions, 9513 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:50,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:50,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:05:50,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:52,664 INFO L124 PetriNetUnfolderBase]: 4650/7114 cut-off events. [2024-06-14 13:05:52,665 INFO L125 PetriNetUnfolderBase]: For 1220125/1220125 co-relation queries the response was YES. [2024-06-14 13:05:52,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73916 conditions, 7114 events. 4650/7114 cut-off events. For 1220125/1220125 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 40930 event pairs, 908 based on Foata normal form. 2/7114 useless extension candidates. Maximal degree in co-relation 73725. Up to 6953 conditions per place. [2024-06-14 13:05:52,790 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 573 selfloop transitions, 57 changer transitions 0/633 dead transitions. [2024-06-14 13:05:52,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 633 transitions, 11216 flow [2024-06-14 13:05:52,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:05:52,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:05:52,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 13:05:52,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:05:52,792 INFO L175 Difference]: Start difference. First operand has 385 places, 587 transitions, 9513 flow. Second operand 9 states and 153 transitions. [2024-06-14 13:05:52,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 633 transitions, 11216 flow [2024-06-14 13:05:57,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 633 transitions, 11105 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-14 13:05:57,098 INFO L231 Difference]: Finished difference. Result has 390 places, 590 transitions, 9603 flow [2024-06-14 13:05:57,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9402, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9603, PETRI_PLACES=390, PETRI_TRANSITIONS=590} [2024-06-14 13:05:57,099 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 346 predicate places. [2024-06-14 13:05:57,099 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 590 transitions, 9603 flow [2024-06-14 13:05:57,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:57,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:57,100 INFO 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] [2024-06-14 13:05:57,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 13:05:57,100 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)] === [2024-06-14 13:05:57,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:57,100 INFO L85 PathProgramCache]: Analyzing trace with hash -349907923, now seen corresponding path program 3 times [2024-06-14 13:05:57,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:57,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903429920] [2024-06-14 13:05:57,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:57,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:57,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:59,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:59,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:59,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903429920] [2024-06-14 13:05:59,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903429920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:59,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:59,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:05:59,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951483844] [2024-06-14 13:05:59,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:59,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:05:59,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:59,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:05:59,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:05:59,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:05:59,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 590 transitions, 9603 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:59,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:59,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:05:59,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:01,931 INFO L124 PetriNetUnfolderBase]: 4658/7126 cut-off events. [2024-06-14 13:06:01,932 INFO L125 PetriNetUnfolderBase]: For 1240819/1240819 co-relation queries the response was YES. [2024-06-14 13:06:02,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74270 conditions, 7126 events. 4658/7126 cut-off events. For 1240819/1240819 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 41067 event pairs, 911 based on Foata normal form. 2/7126 useless extension candidates. Maximal degree in co-relation 74078. Up to 7039 conditions per place. [2024-06-14 13:06:02,065 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 580 selfloop transitions, 31 changer transitions 0/614 dead transitions. [2024-06-14 13:06:02,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 614 transitions, 10958 flow [2024-06-14 13:06:02,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:06:02,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:06:02,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-14 13:06:02,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3687707641196013 [2024-06-14 13:06:02,066 INFO L175 Difference]: Start difference. First operand has 390 places, 590 transitions, 9603 flow. Second operand 7 states and 111 transitions. [2024-06-14 13:06:02,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 614 transitions, 10958 flow [2024-06-14 13:06:05,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 614 transitions, 10770 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-14 13:06:05,015 INFO L231 Difference]: Finished difference. Result has 390 places, 592 transitions, 9557 flow [2024-06-14 13:06:05,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9415, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9557, PETRI_PLACES=390, PETRI_TRANSITIONS=592} [2024-06-14 13:06:05,016 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 346 predicate places. [2024-06-14 13:06:05,016 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 592 transitions, 9557 flow [2024-06-14 13:06:05,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:05,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:05,016 INFO 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] [2024-06-14 13:06:05,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 13:06:05,016 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)] === [2024-06-14 13:06:05,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:05,017 INFO L85 PathProgramCache]: Analyzing trace with hash -764059429, now seen corresponding path program 5 times [2024-06-14 13:06:05,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:05,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904279597] [2024-06-14 13:06:05,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:05,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:05,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:07,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:07,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:07,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904279597] [2024-06-14 13:06:07,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904279597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:07,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:07,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:07,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517162290] [2024-06-14 13:06:07,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:07,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:07,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:07,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:07,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:07,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:06:07,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 592 transitions, 9557 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:07,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:07,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:06:07,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:10,271 INFO L124 PetriNetUnfolderBase]: 4694/7182 cut-off events. [2024-06-14 13:06:10,271 INFO L125 PetriNetUnfolderBase]: For 1313749/1313749 co-relation queries the response was YES. [2024-06-14 13:06:10,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74867 conditions, 7182 events. 4694/7182 cut-off events. For 1313749/1313749 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 41238 event pairs, 793 based on Foata normal form. 13/7193 useless extension candidates. Maximal degree in co-relation 74674. Up to 6953 conditions per place. [2024-06-14 13:06:10,401 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 585 selfloop transitions, 56 changer transitions 0/644 dead transitions. [2024-06-14 13:06:10,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 644 transitions, 11188 flow [2024-06-14 13:06:10,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:06:10,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:06:10,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 13:06:10,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 13:06:10,402 INFO L175 Difference]: Start difference. First operand has 390 places, 592 transitions, 9557 flow. Second operand 8 states and 152 transitions. [2024-06-14 13:06:10,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 644 transitions, 11188 flow [2024-06-14 13:06:15,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 644 transitions, 11045 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-14 13:06:15,056 INFO L231 Difference]: Finished difference. Result has 394 places, 596 transitions, 9706 flow [2024-06-14 13:06:15,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9414, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9706, PETRI_PLACES=394, PETRI_TRANSITIONS=596} [2024-06-14 13:06:15,057 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 350 predicate places. [2024-06-14 13:06:15,057 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 596 transitions, 9706 flow [2024-06-14 13:06:15,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:15,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:15,057 INFO 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] [2024-06-14 13:06:15,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 13:06:15,058 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)] === [2024-06-14 13:06:15,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:15,058 INFO L85 PathProgramCache]: Analyzing trace with hash -744864221, now seen corresponding path program 5 times [2024-06-14 13:06:15,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:15,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902389773] [2024-06-14 13:06:15,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:15,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:15,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:17,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:17,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:17,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902389773] [2024-06-14 13:06:17,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902389773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:17,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:17,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:17,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359810102] [2024-06-14 13:06:17,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:17,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:17,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:17,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:17,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:17,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:06:17,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 596 transitions, 9706 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:17,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:17,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:06:17,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:19,891 INFO L124 PetriNetUnfolderBase]: 4688/7174 cut-off events. [2024-06-14 13:06:19,891 INFO L125 PetriNetUnfolderBase]: For 1286433/1286433 co-relation queries the response was YES. [2024-06-14 13:06:19,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75375 conditions, 7174 events. 4688/7174 cut-off events. For 1286433/1286433 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 41421 event pairs, 912 based on Foata normal form. 2/7174 useless extension candidates. Maximal degree in co-relation 75180. Up to 7098 conditions per place. [2024-06-14 13:06:20,027 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 584 selfloop transitions, 32 changer transitions 0/619 dead transitions. [2024-06-14 13:06:20,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 619 transitions, 11015 flow [2024-06-14 13:06:20,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:06:20,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:06:20,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-14 13:06:20,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3488372093023256 [2024-06-14 13:06:20,029 INFO L175 Difference]: Start difference. First operand has 394 places, 596 transitions, 9706 flow. Second operand 8 states and 120 transitions. [2024-06-14 13:06:20,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 619 transitions, 11015 flow [2024-06-14 13:06:23,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 619 transitions, 10828 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-14 13:06:23,587 INFO L231 Difference]: Finished difference. Result has 398 places, 596 transitions, 9590 flow [2024-06-14 13:06:23,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9519, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9590, PETRI_PLACES=398, PETRI_TRANSITIONS=596} [2024-06-14 13:06:23,588 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 354 predicate places. [2024-06-14 13:06:23,588 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 596 transitions, 9590 flow [2024-06-14 13:06:23,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:23,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:23,588 INFO 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] [2024-06-14 13:06:23,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 13:06:23,589 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)] === [2024-06-14 13:06:23,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:23,590 INFO L85 PathProgramCache]: Analyzing trace with hash -744851759, now seen corresponding path program 3 times [2024-06-14 13:06:23,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:23,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023342995] [2024-06-14 13:06:23,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:23,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:25,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:25,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:25,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023342995] [2024-06-14 13:06:25,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023342995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:25,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:25,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:25,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963257767] [2024-06-14 13:06:25,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:25,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:25,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:25,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:25,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:25,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:06:25,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 596 transitions, 9590 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:25,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:25,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:06:25,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:28,330 INFO L124 PetriNetUnfolderBase]: 4685/7170 cut-off events. [2024-06-14 13:06:28,331 INFO L125 PetriNetUnfolderBase]: For 1292364/1292364 co-relation queries the response was YES. [2024-06-14 13:06:28,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75160 conditions, 7170 events. 4685/7170 cut-off events. For 1292364/1292364 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 41388 event pairs, 912 based on Foata normal form. 1/7169 useless extension candidates. Maximal degree in co-relation 74963. Up to 7088 conditions per place. [2024-06-14 13:06:28,456 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 579 selfloop transitions, 38 changer transitions 0/620 dead transitions. [2024-06-14 13:06:28,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 620 transitions, 10968 flow [2024-06-14 13:06:28,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:06:28,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:06:28,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-14 13:06:28,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 13:06:28,457 INFO L175 Difference]: Start difference. First operand has 398 places, 596 transitions, 9590 flow. Second operand 7 states and 112 transitions. [2024-06-14 13:06:28,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 620 transitions, 10968 flow [2024-06-14 13:06:31,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 620 transitions, 10873 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 13:06:31,654 INFO L231 Difference]: Finished difference. Result has 398 places, 599 transitions, 9670 flow [2024-06-14 13:06:31,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9495, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9670, PETRI_PLACES=398, PETRI_TRANSITIONS=599} [2024-06-14 13:06:31,655 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 354 predicate places. [2024-06-14 13:06:31,655 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 599 transitions, 9670 flow [2024-06-14 13:06:31,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:31,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:31,655 INFO 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] [2024-06-14 13:06:31,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 13:06:31,656 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)] === [2024-06-14 13:06:31,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:31,656 INFO L85 PathProgramCache]: Analyzing trace with hash -763690033, now seen corresponding path program 4 times [2024-06-14 13:06:31,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:31,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582332237] [2024-06-14 13:06:31,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:31,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:34,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:34,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:34,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582332237] [2024-06-14 13:06:34,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582332237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:34,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:34,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:34,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488711718] [2024-06-14 13:06:34,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:34,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:34,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:34,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:34,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:34,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:06:34,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 599 transitions, 9670 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:34,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:34,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:06:34,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:36,796 INFO L124 PetriNetUnfolderBase]: 4680/7163 cut-off events. [2024-06-14 13:06:36,796 INFO L125 PetriNetUnfolderBase]: For 1307501/1307501 co-relation queries the response was YES. [2024-06-14 13:06:36,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75125 conditions, 7163 events. 4680/7163 cut-off events. For 1307501/1307501 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 41314 event pairs, 915 based on Foata normal form. 2/7163 useless extension candidates. Maximal degree in co-relation 74927. Up to 7084 conditions per place. [2024-06-14 13:06:36,916 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 587 selfloop transitions, 32 changer transitions 0/622 dead transitions. [2024-06-14 13:06:36,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 622 transitions, 11045 flow [2024-06-14 13:06:36,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:06:36,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:06:36,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-14 13:06:36,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3687707641196013 [2024-06-14 13:06:36,918 INFO L175 Difference]: Start difference. First operand has 398 places, 599 transitions, 9670 flow. Second operand 7 states and 111 transitions. [2024-06-14 13:06:36,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 622 transitions, 11045 flow [2024-06-14 13:06:40,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 622 transitions, 10909 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 13:06:40,716 INFO L231 Difference]: Finished difference. Result has 399 places, 601 transitions, 9684 flow [2024-06-14 13:06:40,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9534, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9684, PETRI_PLACES=399, PETRI_TRANSITIONS=601} [2024-06-14 13:06:40,717 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 355 predicate places. [2024-06-14 13:06:40,717 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 601 transitions, 9684 flow [2024-06-14 13:06:40,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:40,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:40,717 INFO 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] [2024-06-14 13:06:40,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 13:06:40,717 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)] === [2024-06-14 13:06:40,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:40,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1835295659, now seen corresponding path program 1 times [2024-06-14 13:06:40,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:40,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086343301] [2024-06-14 13:06:40,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:40,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:40,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:43,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:43,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:43,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086343301] [2024-06-14 13:06:43,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086343301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:43,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:43,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:43,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864077174] [2024-06-14 13:06:43,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:43,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:43,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:43,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:43,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:43,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:06:43,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 601 transitions, 9684 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:43,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:43,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:06:43,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:46,619 INFO L124 PetriNetUnfolderBase]: 4709/7208 cut-off events. [2024-06-14 13:06:46,619 INFO L125 PetriNetUnfolderBase]: For 1335020/1335041 co-relation queries the response was YES. [2024-06-14 13:06:46,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75744 conditions, 7208 events. 4709/7208 cut-off events. For 1335020/1335041 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 41524 event pairs, 822 based on Foata normal form. 24/7228 useless extension candidates. Maximal degree in co-relation 75546. Up to 6778 conditions per place. [2024-06-14 13:06:46,744 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 518 selfloop transitions, 115 changer transitions 0/636 dead transitions. [2024-06-14 13:06:46,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 636 transitions, 11388 flow [2024-06-14 13:06:46,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:06:46,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:06:46,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 13:06:46,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-14 13:06:46,745 INFO L175 Difference]: Start difference. First operand has 399 places, 601 transitions, 9684 flow. Second operand 8 states and 131 transitions. [2024-06-14 13:06:46,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 636 transitions, 11388 flow [2024-06-14 13:06:50,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 636 transitions, 11257 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-14 13:06:50,825 INFO L231 Difference]: Finished difference. Result has 402 places, 607 transitions, 9929 flow [2024-06-14 13:06:50,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9553, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9929, PETRI_PLACES=402, PETRI_TRANSITIONS=607} [2024-06-14 13:06:50,826 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 358 predicate places. [2024-06-14 13:06:50,826 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 607 transitions, 9929 flow [2024-06-14 13:06:50,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:50,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:50,826 INFO 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] [2024-06-14 13:06:50,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 13:06:50,827 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)] === [2024-06-14 13:06:50,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:50,827 INFO L85 PathProgramCache]: Analyzing trace with hash 2135871049, now seen corresponding path program 2 times [2024-06-14 13:06:50,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:50,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825837172] [2024-06-14 13:06:50,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:50,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:54,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:54,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:54,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825837172] [2024-06-14 13:06:54,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825837172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:54,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:54,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:54,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569737469] [2024-06-14 13:06:54,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:54,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:54,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:54,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:54,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:54,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:06:54,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 607 transitions, 9929 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:54,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:54,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:06:54,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:56,900 INFO L124 PetriNetUnfolderBase]: 4725/7232 cut-off events. [2024-06-14 13:06:56,900 INFO L125 PetriNetUnfolderBase]: For 1359275/1359296 co-relation queries the response was YES. [2024-06-14 13:06:57,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76515 conditions, 7232 events. 4725/7232 cut-off events. For 1359275/1359296 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 41735 event pairs, 913 based on Foata normal form. 24/7252 useless extension candidates. Maximal degree in co-relation 76316. Up to 6882 conditions per place. [2024-06-14 13:06:57,046 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 520 selfloop transitions, 111 changer transitions 0/634 dead transitions. [2024-06-14 13:06:57,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 634 transitions, 11340 flow [2024-06-14 13:06:57,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:06:57,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:06:57,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 13:06:57,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36627906976744184 [2024-06-14 13:06:57,048 INFO L175 Difference]: Start difference. First operand has 402 places, 607 transitions, 9929 flow. Second operand 8 states and 126 transitions. [2024-06-14 13:06:57,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 634 transitions, 11340 flow [2024-06-14 13:07:00,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 634 transitions, 11091 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-14 13:07:00,978 INFO L231 Difference]: Finished difference. Result has 406 places, 610 transitions, 9987 flow [2024-06-14 13:07:00,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9708, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9987, PETRI_PLACES=406, PETRI_TRANSITIONS=610} [2024-06-14 13:07:00,978 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 362 predicate places. [2024-06-14 13:07:00,978 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 610 transitions, 9987 flow [2024-06-14 13:07:00,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:00,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:00,979 INFO 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] [2024-06-14 13:07:00,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 13:07:00,979 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)] === [2024-06-14 13:07:00,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:00,979 INFO L85 PathProgramCache]: Analyzing trace with hash -2041008567, now seen corresponding path program 3 times [2024-06-14 13:07:00,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:00,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132314135] [2024-06-14 13:07:00,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:00,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:04,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:04,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132314135] [2024-06-14 13:07:04,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132314135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:04,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:04,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:04,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358898083] [2024-06-14 13:07:04,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:04,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:04,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:04,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:04,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:04,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:07:04,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 610 transitions, 9987 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:04,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:04,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:07:04,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:06,892 INFO L124 PetriNetUnfolderBase]: 4829/7390 cut-off events. [2024-06-14 13:07:06,892 INFO L125 PetriNetUnfolderBase]: For 1539377/1539377 co-relation queries the response was YES. [2024-06-14 13:07:06,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77966 conditions, 7390 events. 4829/7390 cut-off events. For 1539377/1539377 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 42760 event pairs, 938 based on Foata normal form. 28/7416 useless extension candidates. Maximal degree in co-relation 77765. Up to 7128 conditions per place. [2024-06-14 13:07:07,018 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 578 selfloop transitions, 63 changer transitions 0/644 dead transitions. [2024-06-14 13:07:07,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 644 transitions, 11566 flow [2024-06-14 13:07:07,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:07:07,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:07:07,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-14 13:07:07,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3669250645994832 [2024-06-14 13:07:07,020 INFO L175 Difference]: Start difference. First operand has 406 places, 610 transitions, 9987 flow. Second operand 9 states and 142 transitions. [2024-06-14 13:07:07,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 644 transitions, 11566 flow [2024-06-14 13:07:10,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 644 transitions, 11316 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 13:07:10,768 INFO L231 Difference]: Finished difference. Result has 409 places, 615 transitions, 9990 flow [2024-06-14 13:07:10,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9739, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9990, PETRI_PLACES=409, PETRI_TRANSITIONS=615} [2024-06-14 13:07:10,768 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 365 predicate places. [2024-06-14 13:07:10,769 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 615 transitions, 9990 flow [2024-06-14 13:07:10,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:10,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:10,769 INFO 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] [2024-06-14 13:07:10,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 13:07:10,771 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)] === [2024-06-14 13:07:10,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:10,771 INFO L85 PathProgramCache]: Analyzing trace with hash -2040823869, now seen corresponding path program 1 times [2024-06-14 13:07:10,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:10,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560182068] [2024-06-14 13:07:10,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:10,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:10,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:13,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:13,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560182068] [2024-06-14 13:07:13,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560182068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:13,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:13,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:13,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736873449] [2024-06-14 13:07:13,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:13,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:13,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:13,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:13,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:13,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:07:13,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 615 transitions, 9990 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:13,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:13,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:07:13,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:16,874 INFO L124 PetriNetUnfolderBase]: 4837/7403 cut-off events. [2024-06-14 13:07:16,875 INFO L125 PetriNetUnfolderBase]: For 1396860/1396860 co-relation queries the response was YES. [2024-06-14 13:07:16,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78261 conditions, 7403 events. 4837/7403 cut-off events. For 1396860/1396860 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 42891 event pairs, 930 based on Foata normal form. 2/7403 useless extension candidates. Maximal degree in co-relation 78059. Up to 7333 conditions per place. [2024-06-14 13:07:16,988 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 602 selfloop transitions, 31 changer transitions 0/636 dead transitions. [2024-06-14 13:07:16,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 636 transitions, 11371 flow [2024-06-14 13:07:16,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:16,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:16,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-14 13:07:16,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34011627906976744 [2024-06-14 13:07:16,993 INFO L175 Difference]: Start difference. First operand has 409 places, 615 transitions, 9990 flow. Second operand 8 states and 117 transitions. [2024-06-14 13:07:16,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 636 transitions, 11371 flow [2024-06-14 13:07:21,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 636 transitions, 11222 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 13:07:21,414 INFO L231 Difference]: Finished difference. Result has 412 places, 618 transitions, 9985 flow [2024-06-14 13:07:21,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9841, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9985, PETRI_PLACES=412, PETRI_TRANSITIONS=618} [2024-06-14 13:07:21,416 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 368 predicate places. [2024-06-14 13:07:21,416 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 618 transitions, 9985 flow [2024-06-14 13:07:21,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:21,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:21,417 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] [2024-06-14 13:07:21,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 13:07:21,418 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)] === [2024-06-14 13:07:21,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:21,418 INFO L85 PathProgramCache]: Analyzing trace with hash -358472851, now seen corresponding path program 2 times [2024-06-14 13:07:21,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:21,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380938296] [2024-06-14 13:07:21,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:21,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:21,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:24,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:24,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:24,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380938296] [2024-06-14 13:07:24,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380938296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:24,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:24,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:24,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693181160] [2024-06-14 13:07:24,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:24,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:24,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:24,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:24,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:24,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:07:24,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 618 transitions, 9985 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:24,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:24,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:07:24,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:27,171 INFO L124 PetriNetUnfolderBase]: 4845/7415 cut-off events. [2024-06-14 13:07:27,173 INFO L125 PetriNetUnfolderBase]: For 1416378/1416378 co-relation queries the response was YES. [2024-06-14 13:07:27,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78245 conditions, 7415 events. 4845/7415 cut-off events. For 1416378/1416378 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 42926 event pairs, 934 based on Foata normal form. 2/7415 useless extension candidates. Maximal degree in co-relation 78041. Up to 7339 conditions per place. [2024-06-14 13:07:27,278 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 602 selfloop transitions, 31 changer transitions 0/636 dead transitions. [2024-06-14 13:07:27,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 636 transitions, 11351 flow [2024-06-14 13:07:27,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:07:27,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:07:27,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-14 13:07:27,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 13:07:27,279 INFO L175 Difference]: Start difference. First operand has 412 places, 618 transitions, 9985 flow. Second operand 6 states and 96 transitions. [2024-06-14 13:07:27,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 636 transitions, 11351 flow [2024-06-14 13:07:31,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 636 transitions, 11238 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:31,455 INFO L231 Difference]: Finished difference. Result has 413 places, 620 transitions, 10002 flow [2024-06-14 13:07:31,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9872, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10002, PETRI_PLACES=413, PETRI_TRANSITIONS=620} [2024-06-14 13:07:31,456 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 369 predicate places. [2024-06-14 13:07:31,456 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 620 transitions, 10002 flow [2024-06-14 13:07:31,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:31,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:31,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:31,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 13:07:31,457 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)] === [2024-06-14 13:07:31,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:31,458 INFO L85 PathProgramCache]: Analyzing trace with hash -349901971, now seen corresponding path program 3 times [2024-06-14 13:07:31,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:31,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983070572] [2024-06-14 13:07:31,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:31,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:31,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:34,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:34,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:34,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983070572] [2024-06-14 13:07:34,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983070572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:34,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:34,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:34,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957244546] [2024-06-14 13:07:34,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:34,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:34,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:34,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:34,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:34,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:07:34,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 620 transitions, 10002 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:34,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:34,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:07:34,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:36,813 INFO L124 PetriNetUnfolderBase]: 4840/7409 cut-off events. [2024-06-14 13:07:36,813 INFO L125 PetriNetUnfolderBase]: For 1426814/1426817 co-relation queries the response was YES. [2024-06-14 13:07:36,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78175 conditions, 7409 events. 4840/7409 cut-off events. For 1426814/1426817 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 42939 event pairs, 938 based on Foata normal form. 4/7410 useless extension candidates. Maximal degree in co-relation 77970. Up to 7318 conditions per place. [2024-06-14 13:07:36,947 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 601 selfloop transitions, 31 changer transitions 0/635 dead transitions. [2024-06-14 13:07:36,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 635 transitions, 11360 flow [2024-06-14 13:07:36,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:07:36,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:07:36,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 91 transitions. [2024-06-14 13:07:36,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35271317829457366 [2024-06-14 13:07:36,949 INFO L175 Difference]: Start difference. First operand has 413 places, 620 transitions, 10002 flow. Second operand 6 states and 91 transitions. [2024-06-14 13:07:36,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 635 transitions, 11360 flow [2024-06-14 13:07:41,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 635 transitions, 11246 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-14 13:07:41,971 INFO L231 Difference]: Finished difference. Result has 415 places, 622 transitions, 10019 flow [2024-06-14 13:07:41,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9892, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10019, PETRI_PLACES=415, PETRI_TRANSITIONS=622} [2024-06-14 13:07:41,971 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 371 predicate places. [2024-06-14 13:07:41,972 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 622 transitions, 10019 flow [2024-06-14 13:07:41,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:41,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:41,974 INFO 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] [2024-06-14 13:07:41,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 13:07:41,974 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)] === [2024-06-14 13:07:41,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:41,975 INFO L85 PathProgramCache]: Analyzing trace with hash -586558699, now seen corresponding path program 4 times [2024-06-14 13:07:41,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:41,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833460485] [2024-06-14 13:07:41,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:41,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:41,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:45,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:45,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:45,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833460485] [2024-06-14 13:07:45,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833460485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:45,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:45,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:45,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579136893] [2024-06-14 13:07:45,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:45,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:45,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:45,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:45,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:45,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:07:45,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 622 transitions, 10019 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:45,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:45,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:07:45,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:48,555 INFO L124 PetriNetUnfolderBase]: 4931/7548 cut-off events. [2024-06-14 13:07:48,555 INFO L125 PetriNetUnfolderBase]: For 1591023/1591023 co-relation queries the response was YES. [2024-06-14 13:07:48,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79148 conditions, 7548 events. 4931/7548 cut-off events. For 1591023/1591023 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 43774 event pairs, 822 based on Foata normal form. 28/7574 useless extension candidates. Maximal degree in co-relation 78942. Up to 6848 conditions per place. [2024-06-14 13:07:48,694 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 524 selfloop transitions, 147 changer transitions 0/674 dead transitions. [2024-06-14 13:07:48,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 674 transitions, 11696 flow [2024-06-14 13:07:48,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:07:48,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:07:48,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 13:07:48,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-14 13:07:48,696 INFO L175 Difference]: Start difference. First operand has 415 places, 622 transitions, 10019 flow. Second operand 9 states and 166 transitions. [2024-06-14 13:07:48,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 674 transitions, 11696 flow [2024-06-14 13:07:53,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 674 transitions, 11585 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 13:07:53,471 INFO L231 Difference]: Finished difference. Result has 420 places, 626 transitions, 10334 flow [2024-06-14 13:07:53,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9908, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10334, PETRI_PLACES=420, PETRI_TRANSITIONS=626} [2024-06-14 13:07:53,472 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 376 predicate places. [2024-06-14 13:07:53,472 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 626 transitions, 10334 flow [2024-06-14 13:07:53,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:53,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:53,472 INFO 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] [2024-06-14 13:07:53,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 13:07:53,472 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)] === [2024-06-14 13:07:53,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:53,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1877397521, now seen corresponding path program 1 times [2024-06-14 13:07:53,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:53,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605291923] [2024-06-14 13:07:53,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:53,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:56,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:56,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:56,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605291923] [2024-06-14 13:07:56,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605291923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:56,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:56,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:56,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041130326] [2024-06-14 13:07:56,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:56,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:56,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:56,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:56,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:56,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:07:56,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 626 transitions, 10334 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:56,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:56,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:07:56,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:59,374 INFO L124 PetriNetUnfolderBase]: 4968/7605 cut-off events. [2024-06-14 13:07:59,374 INFO L125 PetriNetUnfolderBase]: For 1468635/1468641 co-relation queries the response was YES. [2024-06-14 13:07:59,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81095 conditions, 7605 events. 4968/7605 cut-off events. For 1468635/1468641 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 44238 event pairs, 986 based on Foata normal form. 5/7603 useless extension candidates. Maximal degree in co-relation 80888. Up to 6900 conditions per place. [2024-06-14 13:07:59,519 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 483 selfloop transitions, 197 changer transitions 0/683 dead transitions. [2024-06-14 13:07:59,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 683 transitions, 12817 flow [2024-06-14 13:07:59,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:07:59,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:07:59,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 13:07:59,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 13:07:59,521 INFO L175 Difference]: Start difference. First operand has 420 places, 626 transitions, 10334 flow. Second operand 9 states and 165 transitions. [2024-06-14 13:07:59,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 683 transitions, 12817 flow [2024-06-14 13:08:04,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 683 transitions, 12479 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-14 13:08:04,184 INFO L231 Difference]: Finished difference. Result has 423 places, 636 transitions, 10730 flow [2024-06-14 13:08:04,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10002, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10730, PETRI_PLACES=423, PETRI_TRANSITIONS=636} [2024-06-14 13:08:04,185 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 379 predicate places. [2024-06-14 13:08:04,185 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 636 transitions, 10730 flow [2024-06-14 13:08:04,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:04,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:04,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:04,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 13:08:04,185 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)] === [2024-06-14 13:08:04,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:04,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1160183517, now seen corresponding path program 2 times [2024-06-14 13:08:04,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:04,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994088473] [2024-06-14 13:08:04,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:04,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:04,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:06,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:06,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:06,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994088473] [2024-06-14 13:08:06,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994088473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:06,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:06,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:06,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438693518] [2024-06-14 13:08:06,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:06,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:06,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:06,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:06,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:06,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:08:06,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 636 transitions, 10730 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:06,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:06,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:08:06,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:09,880 INFO L124 PetriNetUnfolderBase]: 4997/7645 cut-off events. [2024-06-14 13:08:09,880 INFO L125 PetriNetUnfolderBase]: For 1494469/1494475 co-relation queries the response was YES. [2024-06-14 13:08:09,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82346 conditions, 7645 events. 4997/7645 cut-off events. For 1494469/1494475 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 44440 event pairs, 992 based on Foata normal form. 5/7643 useless extension candidates. Maximal degree in co-relation 82137. Up to 6930 conditions per place. [2024-06-14 13:08:10,010 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 480 selfloop transitions, 204 changer transitions 0/687 dead transitions. [2024-06-14 13:08:10,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 687 transitions, 13155 flow [2024-06-14 13:08:10,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:08:10,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:08:10,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 13:08:10,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-14 13:08:10,011 INFO L175 Difference]: Start difference. First operand has 423 places, 636 transitions, 10730 flow. Second operand 9 states and 163 transitions. [2024-06-14 13:08:10,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 687 transitions, 13155 flow [2024-06-14 13:08:15,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 687 transitions, 12767 flow, removed 89 selfloop flow, removed 4 redundant places. [2024-06-14 13:08:15,855 INFO L231 Difference]: Finished difference. Result has 428 places, 643 transitions, 10966 flow [2024-06-14 13:08:15,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10392, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10966, PETRI_PLACES=428, PETRI_TRANSITIONS=643} [2024-06-14 13:08:15,856 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 384 predicate places. [2024-06-14 13:08:15,856 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 643 transitions, 10966 flow [2024-06-14 13:08:15,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:15,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:15,856 INFO 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] [2024-06-14 13:08:15,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 13:08:15,856 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)] === [2024-06-14 13:08:15,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:15,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1690994212, now seen corresponding path program 1 times [2024-06-14 13:08:15,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:15,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288722999] [2024-06-14 13:08:15,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:15,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:18,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:18,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288722999] [2024-06-14 13:08:18,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288722999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:18,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:18,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:08:18,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743054950] [2024-06-14 13:08:18,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:18,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:08:18,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:18,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:08:18,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:08:18,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:08:18,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 643 transitions, 10966 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:18,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:18,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:08:18,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:21,452 INFO L124 PetriNetUnfolderBase]: 5112/7816 cut-off events. [2024-06-14 13:08:21,453 INFO L125 PetriNetUnfolderBase]: For 1638020/1638020 co-relation queries the response was YES. [2024-06-14 13:08:21,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85886 conditions, 7816 events. 5112/7816 cut-off events. For 1638020/1638020 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 45387 event pairs, 846 based on Foata normal form. 8/7822 useless extension candidates. Maximal degree in co-relation 85675. Up to 7313 conditions per place. [2024-06-14 13:08:21,594 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 604 selfloop transitions, 97 changer transitions 0/704 dead transitions. [2024-06-14 13:08:21,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 704 transitions, 13046 flow [2024-06-14 13:08:21,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:08:21,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:08:21,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-14 13:08:21,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40232558139534885 [2024-06-14 13:08:21,595 INFO L175 Difference]: Start difference. First operand has 428 places, 643 transitions, 10966 flow. Second operand 10 states and 173 transitions. [2024-06-14 13:08:21,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 704 transitions, 13046 flow [2024-06-14 13:08:26,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 704 transitions, 12648 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 13:08:26,698 INFO L231 Difference]: Finished difference. Result has 434 places, 646 transitions, 10928 flow [2024-06-14 13:08:26,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10568, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10928, PETRI_PLACES=434, PETRI_TRANSITIONS=646} [2024-06-14 13:08:26,699 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 390 predicate places. [2024-06-14 13:08:26,699 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 646 transitions, 10928 flow [2024-06-14 13:08:26,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:26,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:26,699 INFO 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] [2024-06-14 13:08:26,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 13:08:26,699 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)] === [2024-06-14 13:08:26,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:26,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1871676006, now seen corresponding path program 2 times [2024-06-14 13:08:26,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:26,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80577275] [2024-06-14 13:08:26,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:26,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:26,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:29,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:29,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80577275] [2024-06-14 13:08:29,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80577275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:29,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:29,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:08:29,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375329277] [2024-06-14 13:08:29,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:29,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:08:29,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:29,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:08:29,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:08:29,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:08:29,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 646 transitions, 10928 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:29,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:29,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:08:29,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:32,588 INFO L124 PetriNetUnfolderBase]: 5156/7884 cut-off events. [2024-06-14 13:08:32,588 INFO L125 PetriNetUnfolderBase]: For 1697229/1697229 co-relation queries the response was YES. [2024-06-14 13:08:32,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86875 conditions, 7884 events. 5156/7884 cut-off events. For 1697229/1697229 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 46045 event pairs, 971 based on Foata normal form. 12/7894 useless extension candidates. Maximal degree in co-relation 86662. Up to 7603 conditions per place. [2024-06-14 13:08:32,731 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 604 selfloop transitions, 92 changer transitions 0/699 dead transitions. [2024-06-14 13:08:32,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 699 transitions, 12650 flow [2024-06-14 13:08:32,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:08:32,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:08:32,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 186 transitions. [2024-06-14 13:08:32,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36046511627906974 [2024-06-14 13:08:32,732 INFO L175 Difference]: Start difference. First operand has 434 places, 646 transitions, 10928 flow. Second operand 12 states and 186 transitions. [2024-06-14 13:08:32,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 699 transitions, 12650 flow [2024-06-14 13:08:39,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 699 transitions, 12505 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 13:08:39,858 INFO L231 Difference]: Finished difference. Result has 440 places, 647 transitions, 11026 flow [2024-06-14 13:08:39,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10785, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11026, PETRI_PLACES=440, PETRI_TRANSITIONS=647} [2024-06-14 13:08:39,859 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 396 predicate places. [2024-06-14 13:08:39,859 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 647 transitions, 11026 flow [2024-06-14 13:08:39,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:39,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:39,859 INFO 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] [2024-06-14 13:08:39,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 13:08:39,860 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)] === [2024-06-14 13:08:39,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:39,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1871685306, now seen corresponding path program 3 times [2024-06-14 13:08:39,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:39,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102658391] [2024-06-14 13:08:39,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:39,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:39,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:42,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:42,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:42,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102658391] [2024-06-14 13:08:42,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102658391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:42,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:42,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:08:42,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731169779] [2024-06-14 13:08:42,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:42,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:08:42,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:42,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:08:42,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:08:42,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:08:42,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 647 transitions, 11026 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:42,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:42,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:08:42,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:45,685 INFO L124 PetriNetUnfolderBase]: 5230/7998 cut-off events. [2024-06-14 13:08:45,686 INFO L125 PetriNetUnfolderBase]: For 1701592/1701592 co-relation queries the response was YES. [2024-06-14 13:08:45,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88491 conditions, 7998 events. 5230/7998 cut-off events. For 1701592/1701592 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 46834 event pairs, 978 based on Foata normal form. 8/8004 useless extension candidates. Maximal degree in co-relation 88276. Up to 7652 conditions per place. [2024-06-14 13:08:45,824 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 585 selfloop transitions, 120 changer transitions 0/708 dead transitions. [2024-06-14 13:08:45,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 708 transitions, 13200 flow [2024-06-14 13:08:45,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:08:45,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:08:45,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-14 13:08:45,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39767441860465114 [2024-06-14 13:08:45,826 INFO L175 Difference]: Start difference. First operand has 440 places, 647 transitions, 11026 flow. Second operand 10 states and 171 transitions. [2024-06-14 13:08:45,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 708 transitions, 13200 flow [2024-06-14 13:08:53,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 708 transitions, 12979 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-14 13:08:53,160 INFO L231 Difference]: Finished difference. Result has 442 places, 655 transitions, 11362 flow [2024-06-14 13:08:53,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10828, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11362, PETRI_PLACES=442, PETRI_TRANSITIONS=655} [2024-06-14 13:08:53,173 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 398 predicate places. [2024-06-14 13:08:53,173 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 655 transitions, 11362 flow [2024-06-14 13:08:53,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:53,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:53,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:53,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 13:08:53,174 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)] === [2024-06-14 13:08:53,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:53,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1790705711, now seen corresponding path program 3 times [2024-06-14 13:08:53,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:53,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994022974] [2024-06-14 13:08:53,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:53,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:53,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:56,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:56,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994022974] [2024-06-14 13:08:56,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994022974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:56,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:56,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:56,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249600176] [2024-06-14 13:08:56,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:56,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:56,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:56,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:56,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:56,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:08:56,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 655 transitions, 11362 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:56,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:56,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:08:56,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:59,677 INFO L124 PetriNetUnfolderBase]: 5235/8005 cut-off events. [2024-06-14 13:08:59,677 INFO L125 PetriNetUnfolderBase]: For 1679309/1679309 co-relation queries the response was YES. [2024-06-14 13:08:59,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89109 conditions, 8005 events. 5235/8005 cut-off events. For 1679309/1679309 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 46960 event pairs, 1004 based on Foata normal form. 1/8004 useless extension candidates. Maximal degree in co-relation 88891. Up to 7864 conditions per place. [2024-06-14 13:08:59,821 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 646 selfloop transitions, 51 changer transitions 0/700 dead transitions. [2024-06-14 13:08:59,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 700 transitions, 13290 flow [2024-06-14 13:08:59,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:08:59,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:08:59,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 13:08:59,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772609819121447 [2024-06-14 13:08:59,823 INFO L175 Difference]: Start difference. First operand has 442 places, 655 transitions, 11362 flow. Second operand 9 states and 146 transitions. [2024-06-14 13:08:59,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 700 transitions, 13290 flow [2024-06-14 13:09:06,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 700 transitions, 13072 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 13:09:06,886 INFO L231 Difference]: Finished difference. Result has 446 places, 661 transitions, 11438 flow [2024-06-14 13:09:06,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11144, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11438, PETRI_PLACES=446, PETRI_TRANSITIONS=661} [2024-06-14 13:09:06,895 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 402 predicate places. [2024-06-14 13:09:06,896 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 661 transitions, 11438 flow [2024-06-14 13:09:06,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:06,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:06,896 INFO 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] [2024-06-14 13:09:06,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 13:09:06,896 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)] === [2024-06-14 13:09:06,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:06,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1790556756, now seen corresponding path program 1 times [2024-06-14 13:09:06,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:06,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947964199] [2024-06-14 13:09:06,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:06,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:09,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:09,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947964199] [2024-06-14 13:09:09,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947964199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:09,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:09,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:09:09,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069698672] [2024-06-14 13:09:09,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:09,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:09:09,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:09,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:09:09,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:09:09,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:09:09,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 661 transitions, 11438 flow. Second operand has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:09,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:09,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:09:09,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:12,588 INFO L124 PetriNetUnfolderBase]: 5261/8043 cut-off events. [2024-06-14 13:09:12,588 INFO L125 PetriNetUnfolderBase]: For 1730208/1730229 co-relation queries the response was YES. [2024-06-14 13:09:12,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89957 conditions, 8043 events. 5261/8043 cut-off events. For 1730208/1730229 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 47189 event pairs, 969 based on Foata normal form. 22/8061 useless extension candidates. Maximal degree in co-relation 89738. Up to 7879 conditions per place. [2024-06-14 13:09:12,744 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 648 selfloop transitions, 49 changer transitions 0/700 dead transitions. [2024-06-14 13:09:12,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 700 transitions, 13358 flow [2024-06-14 13:09:12,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:09:12,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:09:12,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 13:09:12,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-14 13:09:12,746 INFO L175 Difference]: Start difference. First operand has 446 places, 661 transitions, 11438 flow. Second operand 8 states and 130 transitions. [2024-06-14 13:09:12,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 700 transitions, 13358 flow [2024-06-14 13:09:20,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 700 transitions, 13181 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-14 13:09:20,145 INFO L231 Difference]: Finished difference. Result has 449 places, 667 transitions, 11543 flow [2024-06-14 13:09:20,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11261, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11543, PETRI_PLACES=449, PETRI_TRANSITIONS=667} [2024-06-14 13:09:20,146 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 405 predicate places. [2024-06-14 13:09:20,146 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 667 transitions, 11543 flow [2024-06-14 13:09:20,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:20,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:20,146 INFO 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] [2024-06-14 13:09:20,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 13:09:20,146 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)] === [2024-06-14 13:09:20,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:20,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1367850646, now seen corresponding path program 1 times [2024-06-14 13:09:20,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:20,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60169296] [2024-06-14 13:09:20,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:20,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:22,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:22,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:22,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60169296] [2024-06-14 13:09:22,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60169296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:22,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:22,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:22,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307037248] [2024-06-14 13:09:22,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:22,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:22,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:22,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:22,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:22,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 13:09:22,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 667 transitions, 11543 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:22,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:22,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 13:09:22,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:25,973 INFO L124 PetriNetUnfolderBase]: 5345/8160 cut-off events. [2024-06-14 13:09:25,973 INFO L125 PetriNetUnfolderBase]: For 1828750/1828756 co-relation queries the response was YES. [2024-06-14 13:09:26,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92961 conditions, 8160 events. 5345/8160 cut-off events. For 1828750/1828756 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 47900 event pairs, 984 based on Foata normal form. 6/8161 useless extension candidates. Maximal degree in co-relation 92740. Up to 7360 conditions per place. [2024-06-14 13:09:26,139 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 548 selfloop transitions, 221 changer transitions 0/772 dead transitions. [2024-06-14 13:09:26,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 772 transitions, 15348 flow [2024-06-14 13:09:26,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:09:26,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:09:26,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 13:09:26,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 13:09:26,141 INFO L175 Difference]: Start difference. First operand has 449 places, 667 transitions, 11543 flow. Second operand 9 states and 159 transitions. [2024-06-14 13:09:26,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 772 transitions, 15348 flow [2024-06-14 13:09:31,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 772 transitions, 15191 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-14 13:09:31,731 INFO L231 Difference]: Finished difference. Result has 457 places, 725 transitions, 13296 flow [2024-06-14 13:09:31,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11386, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13296, PETRI_PLACES=457, PETRI_TRANSITIONS=725} [2024-06-14 13:09:31,732 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 413 predicate places. [2024-06-14 13:09:31,732 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 725 transitions, 13296 flow [2024-06-14 13:09:31,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:31,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:31,732 INFO 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] [2024-06-14 13:09:31,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 13:09:31,732 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)] === [2024-06-14 13:09:31,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:31,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1790436786, now seen corresponding path program 2 times [2024-06-14 13:09:31,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:31,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422658162] [2024-06-14 13:09:31,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:31,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:31,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15