./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix008.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/mix008.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/mix008.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix008.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 11:51:54,884 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 11:51:54,962 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 11:51:54,965 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 11:51:54,966 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 11:51:55,003 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 11:51:55,005 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 11:51:55,005 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 11:51:55,006 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 11:51:55,010 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 11:51:55,010 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 11:51:55,010 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 11:51:55,011 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 11:51:55,012 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 11:51:55,013 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 11:51:55,013 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 11:51:55,013 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 11:51:55,013 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 11:51:55,014 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 11:51:55,014 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 11:51:55,014 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 11:51:55,015 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 11:51:55,015 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 11:51:55,015 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 11:51:55,015 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 11:51:55,016 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 11:51:55,016 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 11:51:55,016 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 11:51:55,017 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 11:51:55,017 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 11:51:55,018 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 11:51:55,018 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 11:51:55,019 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:51:55,019 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 11:51:55,019 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 11:51:55,019 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 11:51:55,019 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 11:51:55,020 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 11:51:55,020 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 11:51:55,020 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 11:51:55,020 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 11:51:55,021 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 11:51:55,021 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 11:51:55,021 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 11:51:55,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 11:51:55,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 11:51:55,290 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 11:51:55,291 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 11:51:55,291 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 11:51:55,292 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix008.opt.i [2024-06-14 11:51:56,471 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 11:51:56,694 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 11:51:56,695 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix008.opt.i [2024-06-14 11:51:56,708 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2745b7866/e4b914ae039644efab6b15b2460dc83e/FLAGbeb5a76b5 [2024-06-14 11:51:56,721 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2745b7866/e4b914ae039644efab6b15b2460dc83e [2024-06-14 11:51:56,723 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 11:51:56,723 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 11:51:56,724 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix008.opt.yml/witness.yml [2024-06-14 11:51:56,949 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 11:51:56,951 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 11:51:56,952 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 11:51:56,952 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 11:51:56,957 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 11:51:56,958 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:51:56" (1/2) ... [2024-06-14 11:51:56,958 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@699a13fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:51:56, skipping insertion in model container [2024-06-14 11:51:56,959 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:51:56" (1/2) ... [2024-06-14 11:51:56,961 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@17129dba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:51:56, skipping insertion in model container [2024-06-14 11:51:56,961 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:51:56" (2/2) ... [2024-06-14 11:51:56,962 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@699a13fd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:51:56, skipping insertion in model container [2024-06-14 11:51:56,962 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:51:56" (2/2) ... [2024-06-14 11:51:56,962 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 11:51:57,100 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 11:51:57,102 INFO L97 edCorrectnessWitness]: Location invariant before [L872-L872] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! 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 || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) [2024-06-14 11:51:57,102 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) [2024-06-14 11:51:57,103 INFO L97 edCorrectnessWitness]: Location invariant before [L870-L870] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! 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 || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) [2024-06-14 11:51:57,103 INFO L97 edCorrectnessWitness]: Location invariant before [L875-L875] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) [2024-06-14 11:51:57,103 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 11:51:57,104 INFO L106 edCorrectnessWitness]: ghost_update [L868-L868] multithreaded = 1; [2024-06-14 11:51:57,149 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 11:51:57,504 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:51:57,513 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 11:51:57,719 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:51:57,767 INFO L206 MainTranslator]: Completed translation [2024-06-14 11:51:57,768 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:51:57 WrapperNode [2024-06-14 11:51:57,768 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 11:51:57,769 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 11:51:57,769 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 11:51:57,769 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 11:51:57,776 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:51:57" (1/1) ... [2024-06-14 11:51:57,809 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:51:57" (1/1) ... [2024-06-14 11:51:57,849 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 161 [2024-06-14 11:51:57,850 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 11:51:57,850 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 11:51:57,851 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 11:51:57,851 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 11:51:57,859 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:51:57" (1/1) ... [2024-06-14 11:51:57,859 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:51:57" (1/1) ... [2024-06-14 11:51:57,889 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:51:57" (1/1) ... [2024-06-14 11:51:57,905 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 11:51:57,905 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:51:57" (1/1) ... [2024-06-14 11:51:57,906 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:51:57" (1/1) ... [2024-06-14 11:51:57,916 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:51:57" (1/1) ... [2024-06-14 11:51:57,917 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:51:57" (1/1) ... [2024-06-14 11:51:57,919 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:51:57" (1/1) ... [2024-06-14 11:51:57,921 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:51:57" (1/1) ... [2024-06-14 11:51:57,924 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 11:51:57,925 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 11:51:57,925 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 11:51:57,925 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 11:51:57,926 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:51:57" (1/1) ... [2024-06-14 11:51:57,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:51:57,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 11:51:57,953 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 11:51:57,960 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 11:51:57,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 11:51:57,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 11:51:57,987 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 11:51:57,987 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 11:51:57,987 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 11:51:57,987 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 11:51:57,987 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 11:51:57,988 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 11:51:57,988 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 11:51:57,988 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 11:51:57,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 11:51:57,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 11:51:57,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 11:51:57,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 11:51:57,991 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 11:51:58,136 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 11:51:58,138 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 11:51:58,571 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 11:51:58,572 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 11:51:58,764 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 11:51:58,765 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 11:51:58,765 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:51:58 BoogieIcfgContainer [2024-06-14 11:51:58,765 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 11:51:58,768 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 11:51:58,768 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 11:51:58,771 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 11:51:58,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 11:51:56" (1/4) ... [2024-06-14 11:51:58,793 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60a82e66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:51:58, skipping insertion in model container [2024-06-14 11:51:58,793 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:51:56" (2/4) ... [2024-06-14 11:51:58,794 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60a82e66 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:51:58, skipping insertion in model container [2024-06-14 11:51:58,794 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:51:57" (3/4) ... [2024-06-14 11:51:58,794 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60a82e66 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:51:58, skipping insertion in model container [2024-06-14 11:51:58,794 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:51:58" (4/4) ... [2024-06-14 11:51:58,798 INFO L112 eAbstractionObserver]: Analyzing ICFG mix008.opt.i [2024-06-14 11:51:58,816 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 11:51:58,816 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 11:51:58,816 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 11:51:58,880 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 11:51:58,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 54 transitions, 124 flow [2024-06-14 11:51:58,958 INFO L124 PetriNetUnfolderBase]: 0/50 cut-off events. [2024-06-14 11:51:58,958 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:51:58,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 50 events. 0/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 90 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 11:51:58,962 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 54 transitions, 124 flow [2024-06-14 11:51:58,966 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 44 transitions, 100 flow [2024-06-14 11:51:58,980 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 11:51:58,988 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;@6a374366, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 11:51:58,988 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 11:51:58,994 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 11:51:58,994 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 11:51:58,994 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:51:58,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:58,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 11:51:58,996 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:51:59,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:59,001 INFO L85 PathProgramCache]: Analyzing trace with hash 335012853, now seen corresponding path program 1 times [2024-06-14 11:51:59,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:59,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161357978] [2024-06-14 11:51:59,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:59,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:59,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:00,262 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 11:52:00,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:00,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161357978] [2024-06-14 11:52:00,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161357978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:00,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:00,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 11:52:00,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645582747] [2024-06-14 11:52:00,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:00,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 11:52:00,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:00,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 11:52:00,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 11:52:00,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-06-14 11:52:00,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 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 11:52:00,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:00,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-06-14 11:52:00,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:02,188 INFO L124 PetriNetUnfolderBase]: 7892/11216 cut-off events. [2024-06-14 11:52:02,188 INFO L125 PetriNetUnfolderBase]: For 152/152 co-relation queries the response was YES. [2024-06-14 11:52:02,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22295 conditions, 11216 events. 7892/11216 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 63270 event pairs, 6010 based on Foata normal form. 1/10838 useless extension candidates. Maximal degree in co-relation 22279. Up to 10748 conditions per place. [2024-06-14 11:52:02,265 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 44 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-14 11:52:02,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 235 flow [2024-06-14 11:52:02,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 11:52:02,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 11:52:02,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-06-14 11:52:02,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6234567901234568 [2024-06-14 11:52:02,277 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 100 flow. Second operand 3 states and 101 transitions. [2024-06-14 11:52:02,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 235 flow [2024-06-14 11:52:02,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 228 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 11:52:02,283 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 135 flow [2024-06-14 11:52:02,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-14 11:52:02,288 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2024-06-14 11:52:02,288 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 135 flow [2024-06-14 11:52:02,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 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 11:52:02,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:02,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:02,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 11:52:02,289 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:52:02,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:02,290 INFO L85 PathProgramCache]: Analyzing trace with hash -175142252, now seen corresponding path program 1 times [2024-06-14 11:52:02,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:02,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154466959] [2024-06-14 11:52:02,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:02,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:02,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:03,157 INFO 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 11:52:03,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:03,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154466959] [2024-06-14 11:52:03,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154466959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:03,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:03,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:52:03,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43311860] [2024-06-14 11:52:03,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:03,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:52:03,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:03,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:52:03,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:52:03,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 11:52:03,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:03,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:03,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 11:52:03,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:04,968 INFO L124 PetriNetUnfolderBase]: 9032/12527 cut-off events. [2024-06-14 11:52:04,968 INFO L125 PetriNetUnfolderBase]: For 2518/2518 co-relation queries the response was YES. [2024-06-14 11:52:04,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28442 conditions, 12527 events. 9032/12527 cut-off events. For 2518/2518 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 68438 event pairs, 6162 based on Foata normal form. 4/12455 useless extension candidates. Maximal degree in co-relation 28427. Up to 12238 conditions per place. [2024-06-14 11:52:05,066 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 55 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-06-14 11:52:05,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 72 transitions, 329 flow [2024-06-14 11:52:05,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:52:05,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:52:05,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-06-14 11:52:05,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-14 11:52:05,071 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 135 flow. Second operand 4 states and 128 transitions. [2024-06-14 11:52:05,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 72 transitions, 329 flow [2024-06-14 11:52:05,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 11:52:05,083 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 183 flow [2024-06-14 11:52:05,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=183, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-06-14 11:52:05,084 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2024-06-14 11:52:05,085 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 183 flow [2024-06-14 11:52:05,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:05,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:05,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:05,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 11:52:05,089 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:52:05,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:05,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1134440792, now seen corresponding path program 1 times [2024-06-14 11:52:05,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:05,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051508312] [2024-06-14 11:52:05,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:05,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:05,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:06,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:52:06,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:06,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051508312] [2024-06-14 11:52:06,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051508312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:06,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:06,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:52:06,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430589357] [2024-06-14 11:52:06,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:06,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:52:06,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:06,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:52:06,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:52:06,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 11:52:06,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 183 flow. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 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 11:52:06,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:06,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 11:52:06,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:07,692 INFO L124 PetriNetUnfolderBase]: 9050/12628 cut-off events. [2024-06-14 11:52:07,692 INFO L125 PetriNetUnfolderBase]: For 7273/7273 co-relation queries the response was YES. [2024-06-14 11:52:07,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31885 conditions, 12628 events. 9050/12628 cut-off events. For 7273/7273 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 69843 event pairs, 4826 based on Foata normal form. 7/12608 useless extension candidates. Maximal degree in co-relation 31868. Up to 12159 conditions per place. [2024-06-14 11:52:07,768 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 73 selfloop transitions, 21 changer transitions 0/102 dead transitions. [2024-06-14 11:52:07,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 102 transitions, 545 flow [2024-06-14 11:52:07,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:52:07,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:52:07,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2024-06-14 11:52:07,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6185185185185185 [2024-06-14 11:52:07,771 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 183 flow. Second operand 5 states and 167 transitions. [2024-06-14 11:52:07,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 102 transitions, 545 flow [2024-06-14 11:52:07,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 102 transitions, 526 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 11:52:07,776 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 314 flow [2024-06-14 11:52:07,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=314, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-06-14 11:52:07,777 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2024-06-14 11:52:07,777 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 314 flow [2024-06-14 11:52:07,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 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 11:52:07,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:07,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:07,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 11:52:07,778 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:52:07,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:07,779 INFO L85 PathProgramCache]: Analyzing trace with hash 724148263, now seen corresponding path program 1 times [2024-06-14 11:52:07,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:07,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629955240] [2024-06-14 11:52:07,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:07,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:08,893 INFO 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 11:52:08,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:08,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629955240] [2024-06-14 11:52:08,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629955240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:08,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:08,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:52:08,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016091432] [2024-06-14 11:52:08,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:08,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:52:08,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:08,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:52:08,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:52:08,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 11:52:08,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 314 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:08,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:08,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 11:52:08,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:10,806 INFO L124 PetriNetUnfolderBase]: 9079/12673 cut-off events. [2024-06-14 11:52:10,807 INFO L125 PetriNetUnfolderBase]: For 17170/17175 co-relation queries the response was YES. [2024-06-14 11:52:10,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37381 conditions, 12673 events. 9079/12673 cut-off events. For 17170/17175 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 70227 event pairs, 3910 based on Foata normal form. 18/12664 useless extension candidates. Maximal degree in co-relation 37361. Up to 12124 conditions per place. [2024-06-14 11:52:10,907 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 80 selfloop transitions, 25 changer transitions 0/113 dead transitions. [2024-06-14 11:52:10,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 113 transitions, 690 flow [2024-06-14 11:52:10,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:52:10,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:52:10,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2024-06-14 11:52:10,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595679012345679 [2024-06-14 11:52:10,909 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 314 flow. Second operand 6 states and 193 transitions. [2024-06-14 11:52:10,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 113 transitions, 690 flow [2024-06-14 11:52:10,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 113 transitions, 678 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-14 11:52:10,920 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 391 flow [2024-06-14 11:52:10,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=391, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-06-14 11:52:10,922 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 12 predicate places. [2024-06-14 11:52:10,922 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 391 flow [2024-06-14 11:52:10,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:10,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:10,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:10,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 11:52:10,923 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:52:10,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:10,924 INFO L85 PathProgramCache]: Analyzing trace with hash -391343180, now seen corresponding path program 1 times [2024-06-14 11:52:10,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:10,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296166348] [2024-06-14 11:52:10,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:10,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:10,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:11,907 INFO 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 11:52:11,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:11,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296166348] [2024-06-14 11:52:11,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296166348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:11,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:11,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:52:11,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963267783] [2024-06-14 11:52:11,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:11,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:52:11,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:11,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:52:11,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:52:11,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 11:52:11,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 391 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:11,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:11,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 11:52:11,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:13,432 INFO L124 PetriNetUnfolderBase]: 7920/11331 cut-off events. [2024-06-14 11:52:13,433 INFO L125 PetriNetUnfolderBase]: For 22247/22247 co-relation queries the response was YES. [2024-06-14 11:52:13,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36248 conditions, 11331 events. 7920/11331 cut-off events. For 22247/22247 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 64745 event pairs, 4036 based on Foata normal form. 3/11162 useless extension candidates. Maximal degree in co-relation 36225. Up to 10775 conditions per place. [2024-06-14 11:52:13,519 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 67 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2024-06-14 11:52:13,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 86 transitions, 589 flow [2024-06-14 11:52:13,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:52:13,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:52:13,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-14 11:52:13,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5074074074074074 [2024-06-14 11:52:13,526 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 391 flow. Second operand 5 states and 137 transitions. [2024-06-14 11:52:13,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 86 transitions, 589 flow [2024-06-14 11:52:13,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 86 transitions, 520 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 11:52:13,539 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 353 flow [2024-06-14 11:52:13,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=353, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2024-06-14 11:52:13,542 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 13 predicate places. [2024-06-14 11:52:13,542 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 353 flow [2024-06-14 11:52:13,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:13,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:13,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:13,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 11:52:13,543 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:52:13,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:13,544 INFO L85 PathProgramCache]: Analyzing trace with hash 719101608, now seen corresponding path program 1 times [2024-06-14 11:52:13,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:13,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468690089] [2024-06-14 11:52:13,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:13,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:13,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:14,602 INFO 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 11:52:14,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:14,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468690089] [2024-06-14 11:52:14,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468690089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:14,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:14,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:52:14,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798538590] [2024-06-14 11:52:14,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:14,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:52:14,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:14,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:52:14,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:52:14,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:52:14,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 353 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:14,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:14,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:52:14,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:16,253 INFO L124 PetriNetUnfolderBase]: 9587/13503 cut-off events. [2024-06-14 11:52:16,254 INFO L125 PetriNetUnfolderBase]: For 30010/30010 co-relation queries the response was YES. [2024-06-14 11:52:16,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43617 conditions, 13503 events. 9587/13503 cut-off events. For 30010/30010 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 75620 event pairs, 4728 based on Foata normal form. 5/13328 useless extension candidates. Maximal degree in co-relation 43592. Up to 12930 conditions per place. [2024-06-14 11:52:16,328 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 81 selfloop transitions, 22 changer transitions 0/111 dead transitions. [2024-06-14 11:52:16,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 111 transitions, 753 flow [2024-06-14 11:52:16,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:52:16,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:52:16,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-14 11:52:16,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5123456790123457 [2024-06-14 11:52:16,334 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 353 flow. Second operand 6 states and 166 transitions. [2024-06-14 11:52:16,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 111 transitions, 753 flow [2024-06-14 11:52:16,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 111 transitions, 724 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 11:52:16,347 INFO L231 Difference]: Finished difference. Result has 74 places, 83 transitions, 498 flow [2024-06-14 11:52:16,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=498, PETRI_PLACES=74, PETRI_TRANSITIONS=83} [2024-06-14 11:52:16,350 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 17 predicate places. [2024-06-14 11:52:16,350 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 83 transitions, 498 flow [2024-06-14 11:52:16,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:16,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:16,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:16,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 11:52:16,351 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:52:16,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:16,352 INFO L85 PathProgramCache]: Analyzing trace with hash 41137883, now seen corresponding path program 1 times [2024-06-14 11:52:16,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:16,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543313012] [2024-06-14 11:52:16,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:16,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:16,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:17,466 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 11:52:17,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:17,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543313012] [2024-06-14 11:52:17,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543313012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:17,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:17,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:52:17,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474052919] [2024-06-14 11:52:17,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:17,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:52:17,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:17,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:52:17,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:52:17,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:52:17,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 83 transitions, 498 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:17,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:17,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:52:17,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:19,295 INFO L124 PetriNetUnfolderBase]: 10390/14515 cut-off events. [2024-06-14 11:52:19,296 INFO L125 PetriNetUnfolderBase]: For 52830/52846 co-relation queries the response was YES. [2024-06-14 11:52:19,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52903 conditions, 14515 events. 10390/14515 cut-off events. For 52830/52846 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 81503 event pairs, 5061 based on Foata normal form. 14/14433 useless extension candidates. Maximal degree in co-relation 52876. Up to 13936 conditions per place. [2024-06-14 11:52:19,392 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 81 selfloop transitions, 25 changer transitions 0/117 dead transitions. [2024-06-14 11:52:19,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 117 transitions, 853 flow [2024-06-14 11:52:19,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:52:19,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:52:19,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-14 11:52:19,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-06-14 11:52:19,394 INFO L175 Difference]: Start difference. First operand has 74 places, 83 transitions, 498 flow. Second operand 6 states and 168 transitions. [2024-06-14 11:52:19,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 117 transitions, 853 flow [2024-06-14 11:52:19,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 117 transitions, 829 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-14 11:52:19,426 INFO L231 Difference]: Finished difference. Result has 79 places, 87 transitions, 570 flow [2024-06-14 11:52:19,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=570, PETRI_PLACES=79, PETRI_TRANSITIONS=87} [2024-06-14 11:52:19,428 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 22 predicate places. [2024-06-14 11:52:19,428 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 87 transitions, 570 flow [2024-06-14 11:52:19,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:19,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:19,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:19,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 11:52:19,429 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:52:19,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:19,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1876377363, now seen corresponding path program 2 times [2024-06-14 11:52:19,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:19,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276680263] [2024-06-14 11:52:19,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:19,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:20,560 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 11:52:20,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:20,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276680263] [2024-06-14 11:52:20,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276680263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:20,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:20,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:52:20,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434000306] [2024-06-14 11:52:20,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:20,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:52:20,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:20,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:52:20,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:52:20,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:52:20,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 87 transitions, 570 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:20,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:20,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:52:20,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:22,549 INFO L124 PetriNetUnfolderBase]: 10366/14467 cut-off events. [2024-06-14 11:52:22,550 INFO L125 PetriNetUnfolderBase]: For 58409/58415 co-relation queries the response was YES. [2024-06-14 11:52:22,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53288 conditions, 14467 events. 10366/14467 cut-off events. For 58409/58415 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 81129 event pairs, 5081 based on Foata normal form. 3/14371 useless extension candidates. Maximal degree in co-relation 53258. Up to 13906 conditions per place. [2024-06-14 11:52:22,711 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 74 selfloop transitions, 26 changer transitions 0/111 dead transitions. [2024-06-14 11:52:22,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 111 transitions, 832 flow [2024-06-14 11:52:22,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:52:22,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:52:22,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-14 11:52:22,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5030864197530864 [2024-06-14 11:52:22,713 INFO L175 Difference]: Start difference. First operand has 79 places, 87 transitions, 570 flow. Second operand 6 states and 163 transitions. [2024-06-14 11:52:22,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 111 transitions, 832 flow [2024-06-14 11:52:22,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 111 transitions, 789 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 11:52:22,744 INFO L231 Difference]: Finished difference. Result has 82 places, 87 transitions, 590 flow [2024-06-14 11:52:22,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=590, PETRI_PLACES=82, PETRI_TRANSITIONS=87} [2024-06-14 11:52:22,745 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 25 predicate places. [2024-06-14 11:52:22,745 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 87 transitions, 590 flow [2024-06-14 11:52:22,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:22,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:22,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:22,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 11:52:22,746 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:52:22,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:22,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1270489261, now seen corresponding path program 1 times [2024-06-14 11:52:22,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:22,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660099625] [2024-06-14 11:52:22,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:22,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:22,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:23,742 INFO 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 11:52:23,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:23,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660099625] [2024-06-14 11:52:23,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660099625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:23,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:23,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:52:23,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350451518] [2024-06-14 11:52:23,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:23,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:52:23,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:23,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:52:23,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:52:23,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 11:52:23,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 87 transitions, 590 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:23,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:23,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 11:52:23,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:25,659 INFO L124 PetriNetUnfolderBase]: 11509/16006 cut-off events. [2024-06-14 11:52:25,659 INFO L125 PetriNetUnfolderBase]: For 74846/74849 co-relation queries the response was YES. [2024-06-14 11:52:25,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60278 conditions, 16006 events. 11509/16006 cut-off events. For 74846/74849 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 89612 event pairs, 4900 based on Foata normal form. 12/16005 useless extension candidates. Maximal degree in co-relation 60247. Up to 14734 conditions per place. [2024-06-14 11:52:25,768 INFO L140 encePairwiseOnDemand]: 37/54 looper letters, 124 selfloop transitions, 59 changer transitions 0/190 dead transitions. [2024-06-14 11:52:25,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 190 transitions, 1670 flow [2024-06-14 11:52:25,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:52:25,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:52:25,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-14 11:52:25,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5347222222222222 [2024-06-14 11:52:25,770 INFO L175 Difference]: Start difference. First operand has 82 places, 87 transitions, 590 flow. Second operand 8 states and 231 transitions. [2024-06-14 11:52:25,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 190 transitions, 1670 flow [2024-06-14 11:52:25,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 190 transitions, 1507 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 11:52:25,839 INFO L231 Difference]: Finished difference. Result has 87 places, 123 transitions, 941 flow [2024-06-14 11:52:25,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=941, PETRI_PLACES=87, PETRI_TRANSITIONS=123} [2024-06-14 11:52:25,840 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 30 predicate places. [2024-06-14 11:52:25,841 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 123 transitions, 941 flow [2024-06-14 11:52:25,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:25,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:25,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:25,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 11:52:25,842 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:52:25,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:25,842 INFO L85 PathProgramCache]: Analyzing trace with hash -610406743, now seen corresponding path program 2 times [2024-06-14 11:52:25,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:25,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777492056] [2024-06-14 11:52:25,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:25,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:25,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:26,890 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 11:52:26,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:26,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777492056] [2024-06-14 11:52:26,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777492056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:26,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:26,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:52:26,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765661139] [2024-06-14 11:52:26,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:26,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:52:26,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:26,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:52:26,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:52:26,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 11:52:26,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 123 transitions, 941 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:26,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:26,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 11:52:26,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:28,933 INFO L124 PetriNetUnfolderBase]: 11857/16523 cut-off events. [2024-06-14 11:52:28,934 INFO L125 PetriNetUnfolderBase]: For 107377/107386 co-relation queries the response was YES. [2024-06-14 11:52:28,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71266 conditions, 16523 events. 11857/16523 cut-off events. For 107377/107386 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 92808 event pairs, 5043 based on Foata normal form. 24/16534 useless extension candidates. Maximal degree in co-relation 71231. Up to 15002 conditions per place. [2024-06-14 11:52:29,064 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 103 selfloop transitions, 81 changer transitions 0/191 dead transitions. [2024-06-14 11:52:29,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 191 transitions, 1813 flow [2024-06-14 11:52:29,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:52:29,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:52:29,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-14 11:52:29,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264550264550265 [2024-06-14 11:52:29,066 INFO L175 Difference]: Start difference. First operand has 87 places, 123 transitions, 941 flow. Second operand 7 states and 199 transitions. [2024-06-14 11:52:29,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 191 transitions, 1813 flow [2024-06-14 11:52:29,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 191 transitions, 1719 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-14 11:52:29,163 INFO L231 Difference]: Finished difference. Result has 94 places, 144 transitions, 1314 flow [2024-06-14 11:52:29,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1314, PETRI_PLACES=94, PETRI_TRANSITIONS=144} [2024-06-14 11:52:29,164 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 37 predicate places. [2024-06-14 11:52:29,164 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 144 transitions, 1314 flow [2024-06-14 11:52:29,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:29,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:29,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:29,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 11:52:29,165 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:52:29,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:29,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1934136411, now seen corresponding path program 3 times [2024-06-14 11:52:29,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:29,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025720940] [2024-06-14 11:52:29,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:29,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:29,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:30,196 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 11:52:30,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:30,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025720940] [2024-06-14 11:52:30,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025720940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:30,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:30,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:52:30,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512325735] [2024-06-14 11:52:30,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:30,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:52:30,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:30,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:52:30,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:52:30,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 11:52:30,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 144 transitions, 1314 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:30,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:30,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 11:52:30,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:32,607 INFO L124 PetriNetUnfolderBase]: 11939/16641 cut-off events. [2024-06-14 11:52:32,608 INFO L125 PetriNetUnfolderBase]: For 140968/140975 co-relation queries the response was YES. [2024-06-14 11:52:32,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78328 conditions, 16641 events. 11939/16641 cut-off events. For 140968/140975 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 93400 event pairs, 5069 based on Foata normal form. 13/16635 useless extension candidates. Maximal degree in co-relation 78289. Up to 15054 conditions per place. [2024-06-14 11:52:32,703 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 107 selfloop transitions, 93 changer transitions 0/207 dead transitions. [2024-06-14 11:52:32,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 207 transitions, 2258 flow [2024-06-14 11:52:32,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:52:32,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:52:32,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-14 11:52:32,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5211640211640212 [2024-06-14 11:52:32,704 INFO L175 Difference]: Start difference. First operand has 94 places, 144 transitions, 1314 flow. Second operand 7 states and 197 transitions. [2024-06-14 11:52:32,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 207 transitions, 2258 flow [2024-06-14 11:52:32,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 207 transitions, 2131 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 11:52:32,794 INFO L231 Difference]: Finished difference. Result has 99 places, 160 transitions, 1597 flow [2024-06-14 11:52:32,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1199, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1597, PETRI_PLACES=99, PETRI_TRANSITIONS=160} [2024-06-14 11:52:32,795 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 42 predicate places. [2024-06-14 11:52:32,795 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 160 transitions, 1597 flow [2024-06-14 11:52:32,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:32,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:32,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:32,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 11:52:32,796 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:52:32,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:32,796 INFO L85 PathProgramCache]: Analyzing trace with hash -605758603, now seen corresponding path program 4 times [2024-06-14 11:52:32,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:32,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924986619] [2024-06-14 11:52:32,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:32,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:32,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:33,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:52:33,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:33,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924986619] [2024-06-14 11:52:33,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924986619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:33,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:33,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:52:33,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90280452] [2024-06-14 11:52:33,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:33,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:52:33,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:33,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:52:33,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:52:33,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 11:52:33,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 160 transitions, 1597 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:33,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:33,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 11:52:33,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:36,246 INFO L124 PetriNetUnfolderBase]: 11954/16668 cut-off events. [2024-06-14 11:52:36,246 INFO L125 PetriNetUnfolderBase]: For 174760/174777 co-relation queries the response was YES. [2024-06-14 11:52:36,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82717 conditions, 16668 events. 11954/16668 cut-off events. For 174760/174777 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 93619 event pairs, 5043 based on Foata normal form. 22/16671 useless extension candidates. Maximal degree in co-relation 82676. Up to 15072 conditions per place. [2024-06-14 11:52:36,394 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 97 selfloop transitions, 108 changer transitions 0/212 dead transitions. [2024-06-14 11:52:36,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 212 transitions, 2418 flow [2024-06-14 11:52:36,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:52:36,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:52:36,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-14 11:52:36,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-14 11:52:36,396 INFO L175 Difference]: Start difference. First operand has 99 places, 160 transitions, 1597 flow. Second operand 7 states and 195 transitions. [2024-06-14 11:52:36,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 212 transitions, 2418 flow [2024-06-14 11:52:36,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 212 transitions, 2223 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-14 11:52:36,560 INFO L231 Difference]: Finished difference. Result has 103 places, 168 transitions, 1750 flow [2024-06-14 11:52:36,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1416, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1750, PETRI_PLACES=103, PETRI_TRANSITIONS=168} [2024-06-14 11:52:36,562 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 46 predicate places. [2024-06-14 11:52:36,562 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 168 transitions, 1750 flow [2024-06-14 11:52:36,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:36,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:36,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:36,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 11:52:36,562 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:52:36,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:36,563 INFO L85 PathProgramCache]: Analyzing trace with hash -433029145, now seen corresponding path program 1 times [2024-06-14 11:52:36,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:36,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215473018] [2024-06-14 11:52:36,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:36,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:37,821 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 11:52:37,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:37,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215473018] [2024-06-14 11:52:37,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215473018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:37,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:37,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:52:37,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4287487] [2024-06-14 11:52:37,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:37,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:52:37,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:37,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:52:37,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:52:37,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:52:37,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 168 transitions, 1750 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:37,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:37,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:52:37,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:40,177 INFO L124 PetriNetUnfolderBase]: 10579/15011 cut-off events. [2024-06-14 11:52:40,177 INFO L125 PetriNetUnfolderBase]: For 159203/159208 co-relation queries the response was YES. [2024-06-14 11:52:40,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74725 conditions, 15011 events. 10579/15011 cut-off events. For 159203/159208 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 86075 event pairs, 4299 based on Foata normal form. 12/14931 useless extension candidates. Maximal degree in co-relation 74682. Up to 14195 conditions per place. [2024-06-14 11:52:40,288 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 174 selfloop transitions, 26 changer transitions 0/208 dead transitions. [2024-06-14 11:52:40,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 208 transitions, 2400 flow [2024-06-14 11:52:40,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:52:40,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:52:40,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-14 11:52:40,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-06-14 11:52:40,290 INFO L175 Difference]: Start difference. First operand has 103 places, 168 transitions, 1750 flow. Second operand 7 states and 192 transitions. [2024-06-14 11:52:40,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 208 transitions, 2400 flow [2024-06-14 11:52:40,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 208 transitions, 2210 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 11:52:40,419 INFO L231 Difference]: Finished difference. Result has 106 places, 172 transitions, 1677 flow [2024-06-14 11:52:40,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1560, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1677, PETRI_PLACES=106, PETRI_TRANSITIONS=172} [2024-06-14 11:52:40,420 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 49 predicate places. [2024-06-14 11:52:40,420 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 172 transitions, 1677 flow [2024-06-14 11:52:40,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:40,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:40,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:40,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 11:52:40,421 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:52:40,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:40,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1670425151, now seen corresponding path program 1 times [2024-06-14 11:52:40,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:40,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499635037] [2024-06-14 11:52:40,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:40,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:41,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:52:41,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:41,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499635037] [2024-06-14 11:52:41,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499635037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:41,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:41,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:52:41,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621810497] [2024-06-14 11:52:41,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:41,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:52:41,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:41,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:52:41,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:52:41,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:52:41,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 172 transitions, 1677 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:41,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:41,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:52:41,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:43,079 INFO L124 PetriNetUnfolderBase]: 10572/14997 cut-off events. [2024-06-14 11:52:43,079 INFO L125 PetriNetUnfolderBase]: For 174301/174303 co-relation queries the response was YES. [2024-06-14 11:52:43,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76507 conditions, 14997 events. 10572/14997 cut-off events. For 174301/174303 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 85846 event pairs, 4456 based on Foata normal form. 2/14906 useless extension candidates. Maximal degree in co-relation 76463. Up to 14310 conditions per place. [2024-06-14 11:52:43,218 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 168 selfloop transitions, 10 changer transitions 0/186 dead transitions. [2024-06-14 11:52:43,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 186 transitions, 2077 flow [2024-06-14 11:52:43,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:52:43,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:52:43,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-14 11:52:43,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-06-14 11:52:43,219 INFO L175 Difference]: Start difference. First operand has 106 places, 172 transitions, 1677 flow. Second operand 5 states and 129 transitions. [2024-06-14 11:52:43,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 186 transitions, 2077 flow [2024-06-14 11:52:43,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 186 transitions, 1982 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 11:52:43,385 INFO L231 Difference]: Finished difference. Result has 106 places, 172 transitions, 1611 flow [2024-06-14 11:52:43,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1582, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1611, PETRI_PLACES=106, PETRI_TRANSITIONS=172} [2024-06-14 11:52:43,386 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 49 predicate places. [2024-06-14 11:52:43,386 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 172 transitions, 1611 flow [2024-06-14 11:52:43,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:43,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:43,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:43,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 11:52:43,387 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:52:43,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:43,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1742743765, now seen corresponding path program 1 times [2024-06-14 11:52:43,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:43,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801829612] [2024-06-14 11:52:43,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:43,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:43,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:52:44,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:44,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801829612] [2024-06-14 11:52:44,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801829612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:44,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:44,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:52:44,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495577861] [2024-06-14 11:52:44,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:44,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:52:44,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:44,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:52:44,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:52:44,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 11:52:44,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 172 transitions, 1611 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:44,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:44,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 11:52:44,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:46,623 INFO L124 PetriNetUnfolderBase]: 12053/16835 cut-off events. [2024-06-14 11:52:46,624 INFO L125 PetriNetUnfolderBase]: For 220016/220031 co-relation queries the response was YES. [2024-06-14 11:52:46,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86830 conditions, 16835 events. 12053/16835 cut-off events. For 220016/220031 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 94798 event pairs, 5134 based on Foata normal form. 24/16843 useless extension candidates. Maximal degree in co-relation 86785. Up to 15181 conditions per place. [2024-06-14 11:52:46,782 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 118 selfloop transitions, 112 changer transitions 0/237 dead transitions. [2024-06-14 11:52:46,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 237 transitions, 2661 flow [2024-06-14 11:52:46,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:52:46,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:52:46,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-14 11:52:46,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-06-14 11:52:46,784 INFO L175 Difference]: Start difference. First operand has 106 places, 172 transitions, 1611 flow. Second operand 7 states and 201 transitions. [2024-06-14 11:52:46,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 237 transitions, 2661 flow [2024-06-14 11:52:46,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 237 transitions, 2628 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 11:52:46,985 INFO L231 Difference]: Finished difference. Result has 111 places, 189 transitions, 2157 flow [2024-06-14 11:52:46,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1578, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2157, PETRI_PLACES=111, PETRI_TRANSITIONS=189} [2024-06-14 11:52:46,986 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 54 predicate places. [2024-06-14 11:52:46,986 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 189 transitions, 2157 flow [2024-06-14 11:52:46,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:46,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:46,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:46,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 11:52:46,987 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:52:46,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:46,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1742738185, now seen corresponding path program 2 times [2024-06-14 11:52:46,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:46,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563988615] [2024-06-14 11:52:46,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:46,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:46,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:47,967 INFO 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 11:52:47,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:47,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563988615] [2024-06-14 11:52:47,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563988615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:47,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:47,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:52:47,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029523000] [2024-06-14 11:52:47,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:47,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:52:47,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:47,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:52:47,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:52:48,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 11:52:48,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 189 transitions, 2157 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:48,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:48,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 11:52:48,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:50,284 INFO L124 PetriNetUnfolderBase]: 12133/16979 cut-off events. [2024-06-14 11:52:50,285 INFO L125 PetriNetUnfolderBase]: For 259650/259679 co-relation queries the response was YES. [2024-06-14 11:52:50,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93367 conditions, 16979 events. 12133/16979 cut-off events. For 259650/259679 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 96101 event pairs, 5122 based on Foata normal form. 36/16999 useless extension candidates. Maximal degree in co-relation 93320. Up to 15259 conditions per place. [2024-06-14 11:52:50,427 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 117 selfloop transitions, 117 changer transitions 0/241 dead transitions. [2024-06-14 11:52:50,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 241 transitions, 3067 flow [2024-06-14 11:52:50,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:52:50,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:52:50,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-14 11:52:50,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-14 11:52:50,429 INFO L175 Difference]: Start difference. First operand has 111 places, 189 transitions, 2157 flow. Second operand 7 states and 195 transitions. [2024-06-14 11:52:50,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 241 transitions, 3067 flow [2024-06-14 11:52:50,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 241 transitions, 2906 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-14 11:52:50,709 INFO L231 Difference]: Finished difference. Result has 115 places, 198 transitions, 2382 flow [2024-06-14 11:52:50,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2004, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2382, PETRI_PLACES=115, PETRI_TRANSITIONS=198} [2024-06-14 11:52:50,710 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 58 predicate places. [2024-06-14 11:52:50,710 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 198 transitions, 2382 flow [2024-06-14 11:52:50,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:50,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:50,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:50,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 11:52:50,710 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:52:50,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:50,711 INFO L85 PathProgramCache]: Analyzing trace with hash -680207813, now seen corresponding path program 3 times [2024-06-14 11:52:50,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:50,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978557899] [2024-06-14 11:52:50,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:50,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:50,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:51,620 INFO 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 11:52:51,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:51,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978557899] [2024-06-14 11:52:51,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978557899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:51,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:51,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:52:51,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819205847] [2024-06-14 11:52:51,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:51,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:52:51,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:51,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:52:51,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:52:51,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 11:52:51,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 198 transitions, 2382 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:51,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:51,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 11:52:51,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:53,993 INFO L124 PetriNetUnfolderBase]: 12148/17017 cut-off events. [2024-06-14 11:52:53,993 INFO L125 PetriNetUnfolderBase]: For 283529/283612 co-relation queries the response was YES. [2024-06-14 11:52:54,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94704 conditions, 17017 events. 12148/17017 cut-off events. For 283529/283612 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 96597 event pairs, 5169 based on Foata normal form. 66/17041 useless extension candidates. Maximal degree in co-relation 94656. Up to 15282 conditions per place. [2024-06-14 11:52:54,157 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 113 selfloop transitions, 124 changer transitions 0/244 dead transitions. [2024-06-14 11:52:54,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 244 transitions, 3192 flow [2024-06-14 11:52:54,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:52:54,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:52:54,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-14 11:52:54,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 11:52:54,159 INFO L175 Difference]: Start difference. First operand has 115 places, 198 transitions, 2382 flow. Second operand 7 states and 189 transitions. [2024-06-14 11:52:54,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 244 transitions, 3192 flow [2024-06-14 11:52:54,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 244 transitions, 2988 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 11:52:54,420 INFO L231 Difference]: Finished difference. Result has 118 places, 207 transitions, 2586 flow [2024-06-14 11:52:54,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2186, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2586, PETRI_PLACES=118, PETRI_TRANSITIONS=207} [2024-06-14 11:52:54,420 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 61 predicate places. [2024-06-14 11:52:54,420 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 207 transitions, 2586 flow [2024-06-14 11:52:54,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:54,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:54,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:54,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 11:52:54,421 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:52:54,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:54,421 INFO L85 PathProgramCache]: Analyzing trace with hash -243569913, now seen corresponding path program 1 times [2024-06-14 11:52:54,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:54,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133182636] [2024-06-14 11:52:54,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:54,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:54,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:55,351 INFO 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 11:52:55,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:55,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133182636] [2024-06-14 11:52:55,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133182636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:55,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:55,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:52:55,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605674196] [2024-06-14 11:52:55,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:55,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:52:55,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:55,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:52:55,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:52:55,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:52:55,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 207 transitions, 2586 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:55,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:55,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:52:55,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:57,533 INFO L124 PetriNetUnfolderBase]: 10739/15415 cut-off events. [2024-06-14 11:52:57,533 INFO L125 PetriNetUnfolderBase]: For 266765/266767 co-relation queries the response was YES. [2024-06-14 11:52:57,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86728 conditions, 15415 events. 10739/15415 cut-off events. For 266765/266767 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 89090 event pairs, 4440 based on Foata normal form. 4/15402 useless extension candidates. Maximal degree in co-relation 86679. Up to 14517 conditions per place. [2024-06-14 11:52:57,654 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 208 selfloop transitions, 14 changer transitions 0/230 dead transitions. [2024-06-14 11:52:57,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 230 transitions, 3130 flow [2024-06-14 11:52:57,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:52:57,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:52:57,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-14 11:52:57,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2024-06-14 11:52:57,656 INFO L175 Difference]: Start difference. First operand has 118 places, 207 transitions, 2586 flow. Second operand 6 states and 152 transitions. [2024-06-14 11:52:57,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 230 transitions, 3130 flow [2024-06-14 11:52:57,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 230 transitions, 2918 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 11:52:57,926 INFO L231 Difference]: Finished difference. Result has 120 places, 211 transitions, 2461 flow [2024-06-14 11:52:57,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2374, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2461, PETRI_PLACES=120, PETRI_TRANSITIONS=211} [2024-06-14 11:52:57,926 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 63 predicate places. [2024-06-14 11:52:57,926 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 211 transitions, 2461 flow [2024-06-14 11:52:57,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:57,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:57,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:57,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 11:52:57,927 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:52:57,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:57,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1691366924, now seen corresponding path program 1 times [2024-06-14 11:52:57,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:57,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574490806] [2024-06-14 11:52:57,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:57,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:59,018 INFO 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 11:52:59,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:59,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574490806] [2024-06-14 11:52:59,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574490806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:59,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:59,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:52:59,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774106788] [2024-06-14 11:52:59,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:59,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:52:59,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:59,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:52:59,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:52:59,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:52:59,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 211 transitions, 2461 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:59,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:59,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:52:59,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:01,377 INFO L124 PetriNetUnfolderBase]: 11575/16297 cut-off events. [2024-06-14 11:53:01,377 INFO L125 PetriNetUnfolderBase]: For 326871/326947 co-relation queries the response was YES. [2024-06-14 11:53:01,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95424 conditions, 16297 events. 11575/16297 cut-off events. For 326871/326947 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 92435 event pairs, 3697 based on Foata normal form. 54/16321 useless extension candidates. Maximal degree in co-relation 95373. Up to 15001 conditions per place. [2024-06-14 11:53:01,501 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 182 selfloop transitions, 41 changer transitions 0/257 dead transitions. [2024-06-14 11:53:01,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 257 transitions, 3257 flow [2024-06-14 11:53:01,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:53:01,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:53:01,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-14 11:53:01,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5105820105820106 [2024-06-14 11:53:01,503 INFO L175 Difference]: Start difference. First operand has 120 places, 211 transitions, 2461 flow. Second operand 7 states and 193 transitions. [2024-06-14 11:53:01,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 257 transitions, 3257 flow [2024-06-14 11:53:01,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 257 transitions, 3200 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 11:53:01,769 INFO L231 Difference]: Finished difference. Result has 123 places, 217 transitions, 2622 flow [2024-06-14 11:53:01,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2404, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2622, PETRI_PLACES=123, PETRI_TRANSITIONS=217} [2024-06-14 11:53:01,769 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 66 predicate places. [2024-06-14 11:53:01,769 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 217 transitions, 2622 flow [2024-06-14 11:53:01,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:01,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:01,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:01,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 11:53:01,770 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:53:01,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:01,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1356558788, now seen corresponding path program 2 times [2024-06-14 11:53:01,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:01,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577615407] [2024-06-14 11:53:01,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:01,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:02,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:53:02,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:02,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577615407] [2024-06-14 11:53:02,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577615407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:02,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:02,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:53:02,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813395092] [2024-06-14 11:53:02,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:02,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:53:02,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:02,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:53:02,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:53:02,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:53:02,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 217 transitions, 2622 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:02,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:02,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:53:02,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:05,020 INFO L124 PetriNetUnfolderBase]: 11550/16257 cut-off events. [2024-06-14 11:53:05,020 INFO L125 PetriNetUnfolderBase]: For 361057/361117 co-relation queries the response was YES. [2024-06-14 11:53:05,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98120 conditions, 16257 events. 11550/16257 cut-off events. For 361057/361117 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 92193 event pairs, 4414 based on Foata normal form. 38/16265 useless extension candidates. Maximal degree in co-relation 98068. Up to 15116 conditions per place. [2024-06-14 11:53:05,481 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 181 selfloop transitions, 40 changer transitions 0/255 dead transitions. [2024-06-14 11:53:05,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 255 transitions, 3194 flow [2024-06-14 11:53:05,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:53:05,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:53:05,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-14 11:53:05,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2024-06-14 11:53:05,483 INFO L175 Difference]: Start difference. First operand has 123 places, 217 transitions, 2622 flow. Second operand 7 states and 190 transitions. [2024-06-14 11:53:05,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 255 transitions, 3194 flow [2024-06-14 11:53:05,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 255 transitions, 3058 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-14 11:53:05,953 INFO L231 Difference]: Finished difference. Result has 127 places, 217 transitions, 2578 flow [2024-06-14 11:53:05,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2486, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2578, PETRI_PLACES=127, PETRI_TRANSITIONS=217} [2024-06-14 11:53:05,954 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 70 predicate places. [2024-06-14 11:53:05,954 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 217 transitions, 2578 flow [2024-06-14 11:53:05,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:05,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:05,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:05,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 11:53:05,955 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:53:05,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:05,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1799196648, now seen corresponding path program 1 times [2024-06-14 11:53:05,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:05,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588459500] [2024-06-14 11:53:05,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:05,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:05,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:53:07,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:07,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588459500] [2024-06-14 11:53:07,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588459500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:07,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:07,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:07,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128135038] [2024-06-14 11:53:07,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:07,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:07,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:07,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:07,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:07,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 11:53:07,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 217 transitions, 2578 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:07,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:07,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 11:53:07,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:09,822 INFO L124 PetriNetUnfolderBase]: 12480/17384 cut-off events. [2024-06-14 11:53:09,823 INFO L125 PetriNetUnfolderBase]: For 408203/408219 co-relation queries the response was YES. [2024-06-14 11:53:09,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105418 conditions, 17384 events. 12480/17384 cut-off events. For 408203/408219 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 97179 event pairs, 4696 based on Foata normal form. 62/17439 useless extension candidates. Maximal degree in co-relation 105364. Up to 15366 conditions per place. [2024-06-14 11:53:09,993 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 135 selfloop transitions, 133 changer transitions 0/275 dead transitions. [2024-06-14 11:53:09,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 275 transitions, 3606 flow [2024-06-14 11:53:09,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:53:09,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:53:09,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-06-14 11:53:09,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5231481481481481 [2024-06-14 11:53:09,995 INFO L175 Difference]: Start difference. First operand has 127 places, 217 transitions, 2578 flow. Second operand 8 states and 226 transitions. [2024-06-14 11:53:09,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 275 transitions, 3606 flow [2024-06-14 11:53:10,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 275 transitions, 3514 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 11:53:10,357 INFO L231 Difference]: Finished difference. Result has 129 places, 221 transitions, 2850 flow [2024-06-14 11:53:10,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2486, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2850, PETRI_PLACES=129, PETRI_TRANSITIONS=221} [2024-06-14 11:53:10,358 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 72 predicate places. [2024-06-14 11:53:10,358 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 221 transitions, 2850 flow [2024-06-14 11:53:10,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:10,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:10,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:10,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 11:53:10,358 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:53:10,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:10,359 INFO L85 PathProgramCache]: Analyzing trace with hash 168953278, now seen corresponding path program 1 times [2024-06-14 11:53:10,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:10,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873545273] [2024-06-14 11:53:10,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:10,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:11,271 INFO 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 11:53:11,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:11,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873545273] [2024-06-14 11:53:11,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873545273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:11,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:11,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:53:11,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815777101] [2024-06-14 11:53:11,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:11,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:53:11,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:11,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:53:11,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:53:11,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 11:53:11,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 221 transitions, 2850 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:11,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:11,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 11:53:11,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:14,129 INFO L124 PetriNetUnfolderBase]: 12503/17417 cut-off events. [2024-06-14 11:53:14,129 INFO L125 PetriNetUnfolderBase]: For 440572/440588 co-relation queries the response was YES. [2024-06-14 11:53:14,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110444 conditions, 17417 events. 12503/17417 cut-off events. For 440572/440588 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 97156 event pairs, 4733 based on Foata normal form. 18/17433 useless extension candidates. Maximal degree in co-relation 110389. Up to 16855 conditions per place. [2024-06-14 11:53:14,286 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 221 selfloop transitions, 29 changer transitions 0/257 dead transitions. [2024-06-14 11:53:14,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 257 transitions, 3672 flow [2024-06-14 11:53:14,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:53:14,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:53:14,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-14 11:53:14,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-14 11:53:14,287 INFO L175 Difference]: Start difference. First operand has 129 places, 221 transitions, 2850 flow. Second operand 6 states and 156 transitions. [2024-06-14 11:53:14,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 257 transitions, 3672 flow [2024-06-14 11:53:14,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 257 transitions, 3350 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 11:53:14,749 INFO L231 Difference]: Finished difference. Result has 129 places, 228 transitions, 2736 flow [2024-06-14 11:53:14,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2540, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2736, PETRI_PLACES=129, PETRI_TRANSITIONS=228} [2024-06-14 11:53:14,749 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 72 predicate places. [2024-06-14 11:53:14,749 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 228 transitions, 2736 flow [2024-06-14 11:53:14,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:14,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:14,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:14,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 11:53:14,750 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:53:14,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:14,750 INFO L85 PathProgramCache]: Analyzing trace with hash 462299782, now seen corresponding path program 2 times [2024-06-14 11:53:14,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:14,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059572630] [2024-06-14 11:53:14,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:14,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:14,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:16,107 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 11:53:16,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:16,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059572630] [2024-06-14 11:53:16,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059572630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:16,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:16,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:16,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908119501] [2024-06-14 11:53:16,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:16,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:16,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:16,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:16,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:16,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 11:53:16,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 228 transitions, 2736 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:16,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:16,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 11:53:16,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:19,402 INFO L124 PetriNetUnfolderBase]: 12574/17508 cut-off events. [2024-06-14 11:53:19,403 INFO L125 PetriNetUnfolderBase]: For 460853/460873 co-relation queries the response was YES. [2024-06-14 11:53:19,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109864 conditions, 17508 events. 12574/17508 cut-off events. For 460853/460873 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 97695 event pairs, 4715 based on Foata normal form. 26/17511 useless extension candidates. Maximal degree in co-relation 109808. Up to 15821 conditions per place. [2024-06-14 11:53:19,569 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 125 selfloop transitions, 148 changer transitions 0/280 dead transitions. [2024-06-14 11:53:19,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 280 transitions, 3702 flow [2024-06-14 11:53:19,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:53:19,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:53:19,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-06-14 11:53:19,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069444444444444 [2024-06-14 11:53:19,570 INFO L175 Difference]: Start difference. First operand has 129 places, 228 transitions, 2736 flow. Second operand 8 states and 219 transitions. [2024-06-14 11:53:19,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 280 transitions, 3702 flow [2024-06-14 11:53:20,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 280 transitions, 3368 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 11:53:20,019 INFO L231 Difference]: Finished difference. Result has 131 places, 232 transitions, 2800 flow [2024-06-14 11:53:20,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2402, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2800, PETRI_PLACES=131, PETRI_TRANSITIONS=232} [2024-06-14 11:53:20,020 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 74 predicate places. [2024-06-14 11:53:20,020 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 232 transitions, 2800 flow [2024-06-14 11:53:20,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:20,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:20,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:20,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 11:53:20,021 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:53:20,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:20,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1964835782, now seen corresponding path program 3 times [2024-06-14 11:53:20,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:20,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769651999] [2024-06-14 11:53:20,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:20,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:21,142 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 11:53:21,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:21,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769651999] [2024-06-14 11:53:21,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769651999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:21,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:21,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:21,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674479963] [2024-06-14 11:53:21,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:21,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:21,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:21,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:21,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:21,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 11:53:21,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 232 transitions, 2800 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:21,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:21,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 11:53:21,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:24,203 INFO L124 PetriNetUnfolderBase]: 12645/17599 cut-off events. [2024-06-14 11:53:24,203 INFO L125 PetriNetUnfolderBase]: For 498523/498535 co-relation queries the response was YES. [2024-06-14 11:53:24,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115010 conditions, 17599 events. 12645/17599 cut-off events. For 498523/498535 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 98061 event pairs, 4743 based on Foata normal form. 18/17594 useless extension candidates. Maximal degree in co-relation 114954. Up to 15918 conditions per place. [2024-06-14 11:53:24,374 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 138 selfloop transitions, 140 changer transitions 0/285 dead transitions. [2024-06-14 11:53:24,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 285 transitions, 3884 flow [2024-06-14 11:53:24,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:53:24,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:53:24,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-14 11:53:24,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5092592592592593 [2024-06-14 11:53:24,376 INFO L175 Difference]: Start difference. First operand has 131 places, 232 transitions, 2800 flow. Second operand 8 states and 220 transitions. [2024-06-14 11:53:24,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 285 transitions, 3884 flow [2024-06-14 11:53:24,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 285 transitions, 3520 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-14 11:53:24,853 INFO L231 Difference]: Finished difference. Result has 133 places, 236 transitions, 2826 flow [2024-06-14 11:53:24,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2436, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2826, PETRI_PLACES=133, PETRI_TRANSITIONS=236} [2024-06-14 11:53:24,853 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 76 predicate places. [2024-06-14 11:53:24,853 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 236 transitions, 2826 flow [2024-06-14 11:53:24,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:24,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:24,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:24,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 11:53:24,854 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:53:24,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:24,855 INFO L85 PathProgramCache]: Analyzing trace with hash 470870662, now seen corresponding path program 4 times [2024-06-14 11:53:24,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:24,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229506117] [2024-06-14 11:53:24,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:24,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:24,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:25,995 INFO 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 11:53:25,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:25,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229506117] [2024-06-14 11:53:25,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229506117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:25,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:25,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:25,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620717907] [2024-06-14 11:53:25,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:25,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:25,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:25,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:25,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:26,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 11:53:26,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 236 transitions, 2826 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:26,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:26,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 11:53:26,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:29,100 INFO L124 PetriNetUnfolderBase]: 12665/17637 cut-off events. [2024-06-14 11:53:29,100 INFO L125 PetriNetUnfolderBase]: For 541527/541547 co-relation queries the response was YES. [2024-06-14 11:53:29,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117886 conditions, 17637 events. 12665/17637 cut-off events. For 541527/541547 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 98483 event pairs, 4283 based on Foata normal form. 26/17640 useless extension candidates. Maximal degree in co-relation 117829. Up to 15362 conditions per place. [2024-06-14 11:53:29,279 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 121 selfloop transitions, 163 changer transitions 0/291 dead transitions. [2024-06-14 11:53:29,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 291 transitions, 3854 flow [2024-06-14 11:53:29,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:53:29,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:53:29,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-14 11:53:29,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5162037037037037 [2024-06-14 11:53:29,281 INFO L175 Difference]: Start difference. First operand has 133 places, 236 transitions, 2826 flow. Second operand 8 states and 223 transitions. [2024-06-14 11:53:29,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 291 transitions, 3854 flow [2024-06-14 11:53:29,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 291 transitions, 3498 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-14 11:53:29,759 INFO L231 Difference]: Finished difference. Result has 135 places, 240 transitions, 2913 flow [2024-06-14 11:53:29,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2470, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2913, PETRI_PLACES=135, PETRI_TRANSITIONS=240} [2024-06-14 11:53:29,760 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 78 predicate places. [2024-06-14 11:53:29,760 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 240 transitions, 2913 flow [2024-06-14 11:53:29,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:29,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:29,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:29,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 11:53:29,761 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:53:29,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:29,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1039255648, now seen corresponding path program 2 times [2024-06-14 11:53:29,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:29,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611929916] [2024-06-14 11:53:29,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:29,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:29,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:30,662 INFO 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 11:53:30,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:30,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611929916] [2024-06-14 11:53:30,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611929916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:30,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:30,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:53:30,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086798343] [2024-06-14 11:53:30,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:30,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:53:30,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:30,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:53:30,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:53:30,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 11:53:30,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 240 transitions, 2913 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:30,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:30,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 11:53:30,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:33,624 INFO L124 PetriNetUnfolderBase]: 12654/17638 cut-off events. [2024-06-14 11:53:33,624 INFO L125 PetriNetUnfolderBase]: For 581381/581403 co-relation queries the response was YES. [2024-06-14 11:53:33,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121031 conditions, 17638 events. 12654/17638 cut-off events. For 581381/581403 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 98647 event pairs, 4738 based on Foata normal form. 23/17658 useless extension candidates. Maximal degree in co-relation 120973. Up to 17074 conditions per place. [2024-06-14 11:53:33,951 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 226 selfloop transitions, 29 changer transitions 0/262 dead transitions. [2024-06-14 11:53:33,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 262 transitions, 3505 flow [2024-06-14 11:53:33,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:53:33,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:53:33,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-14 11:53:33,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567901234567901 [2024-06-14 11:53:33,952 INFO L175 Difference]: Start difference. First operand has 135 places, 240 transitions, 2913 flow. Second operand 6 states and 148 transitions. [2024-06-14 11:53:33,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 262 transitions, 3505 flow [2024-06-14 11:53:34,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 262 transitions, 3068 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-14 11:53:34,518 INFO L231 Difference]: Finished difference. Result has 135 places, 240 transitions, 2546 flow [2024-06-14 11:53:34,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2476, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2546, PETRI_PLACES=135, PETRI_TRANSITIONS=240} [2024-06-14 11:53:34,519 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 78 predicate places. [2024-06-14 11:53:34,519 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 240 transitions, 2546 flow [2024-06-14 11:53:34,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:34,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:34,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:34,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 11:53:34,519 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:53:34,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:34,520 INFO L85 PathProgramCache]: Analyzing trace with hash 174673150, now seen corresponding path program 1 times [2024-06-14 11:53:34,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:34,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179751707] [2024-06-14 11:53:34,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:34,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:34,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:35,460 INFO 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 11:53:35,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:35,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179751707] [2024-06-14 11:53:35,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179751707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:35,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:35,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:53:35,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960625951] [2024-06-14 11:53:35,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:35,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:53:35,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:35,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:53:35,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:53:35,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:53:35,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 240 transitions, 2546 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:35,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:35,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:53:35,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand