./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix006_tso.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix006_tso.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix006_tso.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix006_tso.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 02:55:12,438 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 02:55:12,519 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 02:55:12,524 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 02:55:12,524 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 02:55:12,547 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 02:55:12,547 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 02:55:12,547 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 02:55:12,547 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 02:55:12,548 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 02:55:12,549 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 02:55:12,549 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 02:55:12,550 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 02:55:12,553 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 02:55:12,553 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 02:55:12,554 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 02:55:12,554 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 02:55:12,555 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 02:55:12,556 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 02:55:12,556 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 02:55:12,556 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 02:55:12,556 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 02:55:12,556 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 02:55:12,556 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 02:55:12,557 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 02:55:12,557 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 02:55:12,557 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 02:55:12,557 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 02:55:12,557 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 02:55:12,558 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 02:55:12,558 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 02:55:12,558 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 02:55:12,559 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 02:55:12,559 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 02:55:12,559 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 02:55:12,559 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 02:55:12,559 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 02:55:12,559 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 02:55:12,559 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 02:55:12,559 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 02:55:12,559 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 02:55:12,560 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 02:55:12,560 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 02:55:12,560 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 02:55:12,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 02:55:12,807 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 02:55:12,809 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 02:55:12,809 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 02:55:12,810 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 02:55:12,810 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix006_tso.oepc.yml/witness.yml [2024-06-28 02:55:12,996 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 02:55:13,004 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 02:55:13,005 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix006_tso.oepc.i [2024-06-28 02:55:14,037 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 02:55:14,275 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 02:55:14,275 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix006_tso.oepc.i [2024-06-28 02:55:14,297 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db9783958/b8e5449afdea4cd39d07ef5b11ae7265/FLAG33f1ac3a5 [2024-06-28 02:55:14,306 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db9783958/b8e5449afdea4cd39d07ef5b11ae7265 [2024-06-28 02:55:14,309 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 02:55:14,310 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 02:55:14,312 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 02:55:14,312 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 02:55:14,316 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 02:55:14,316 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:55:12" (1/2) ... [2024-06-28 02:55:14,317 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b6b15b8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:55:14, skipping insertion in model container [2024-06-28 02:55:14,317 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:55:12" (1/2) ... [2024-06-28 02:55:14,318 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@652e0d72 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:55:14, skipping insertion in model container [2024-06-28 02:55:14,318 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 02:55:14" (2/2) ... [2024-06-28 02:55:14,319 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b6b15b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:55:14, skipping insertion in model container [2024-06-28 02:55:14,319 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 02:55:14" (2/2) ... [2024-06-28 02:55:14,320 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 02:55:14,425 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 02:55:14,426 INFO L97 edCorrectnessWitness]: Location invariant before [L904-L904] ((((((((((((((((((((((((((((((! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 2)) && (x$w_buff1 == 0 || x$w_buff1 == 2)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 1)) && (y$w_buff1 == 0 || y$w_buff1 == 1)) && (z == 0 || z == 1)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0) [2024-06-28 02:55:14,426 INFO L97 edCorrectnessWitness]: Location invariant before [L902-L902] ((((((((((((((((((((((((((((((! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 2)) && (x$w_buff1 == 0 || x$w_buff1 == 2)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 1)) && (y$w_buff1 == 0 || y$w_buff1 == 1)) && (z == 0 || z == 1)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0) [2024-06-28 02:55:14,426 INFO L97 edCorrectnessWitness]: Location invariant before [L905-L905] ((((((((((((((((((((((((((((((! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 2)) && (x$w_buff1 == 0 || x$w_buff1 == 2)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 1)) && (y$w_buff1 == 0 || y$w_buff1 == 1)) && (z == 0 || z == 1)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0) [2024-06-28 02:55:14,426 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 02:55:14,427 INFO L106 edCorrectnessWitness]: ghost_update [L900-L900] multithreaded = 1; [2024-06-28 02:55:14,462 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 02:55:14,817 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 02:55:14,830 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 02:55:14,947 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 02:55:14,972 INFO L206 MainTranslator]: Completed translation [2024-06-28 02:55:14,972 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:55:14 WrapperNode [2024-06-28 02:55:14,972 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 02:55:14,973 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 02:55:14,973 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 02:55:14,973 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 02:55:14,978 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:55:14" (1/1) ... [2024-06-28 02:55:15,005 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:55:14" (1/1) ... [2024-06-28 02:55:15,039 INFO L138 Inliner]: procedures = 175, calls = 48, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 271 [2024-06-28 02:55:15,040 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 02:55:15,040 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 02:55:15,040 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 02:55:15,041 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 02:55:15,049 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:55:14" (1/1) ... [2024-06-28 02:55:15,050 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:55:14" (1/1) ... [2024-06-28 02:55:15,062 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:55:14" (1/1) ... [2024-06-28 02:55:15,078 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]. [2024-06-28 02:55:15,087 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:55:14" (1/1) ... [2024-06-28 02:55:15,088 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:55:14" (1/1) ... [2024-06-28 02:55:15,102 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:55:14" (1/1) ... [2024-06-28 02:55:15,149 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:55:14" (1/1) ... [2024-06-28 02:55:15,151 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:55:14" (1/1) ... [2024-06-28 02:55:15,153 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:55:14" (1/1) ... [2024-06-28 02:55:15,156 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 02:55:15,157 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 02:55:15,157 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 02:55:15,157 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 02:55:15,158 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:55:14" (1/1) ... [2024-06-28 02:55:15,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 02:55:15,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 02:55:15,186 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-28 02:55:15,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-28 02:55:15,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 02:55:15,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 02:55:15,254 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 02:55:15,255 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 02:55:15,255 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 02:55:15,255 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 02:55:15,255 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 02:55:15,255 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 02:55:15,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 02:55:15,255 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 02:55:15,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 02:55:15,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 02:55:15,257 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 02:55:15,386 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 02:55:15,388 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 02:55:15,758 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 02:55:15,758 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 02:55:16,091 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 02:55:16,091 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 02:55:16,091 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 02:55:16 BoogieIcfgContainer [2024-06-28 02:55:16,092 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 02:55:16,094 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 02:55:16,094 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 02:55:16,096 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 02:55:16,096 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:55:12" (1/4) ... [2024-06-28 02:55:16,097 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cfafe0a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 02:55:16, skipping insertion in model container [2024-06-28 02:55:16,097 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 02:55:14" (2/4) ... [2024-06-28 02:55:16,097 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cfafe0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 02:55:16, skipping insertion in model container [2024-06-28 02:55:16,097 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:55:14" (3/4) ... [2024-06-28 02:55:16,098 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cfafe0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 02:55:16, skipping insertion in model container [2024-06-28 02:55:16,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 02:55:16" (4/4) ... [2024-06-28 02:55:16,099 INFO L112 eAbstractionObserver]: Analyzing ICFG mix006_tso.oepc.i [2024-06-28 02:55:16,112 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 02:55:16,113 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 02:55:16,113 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 02:55:16,160 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 02:55:16,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 02:55:16,220 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-28 02:55:16,220 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 02:55:16,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 02:55:16,223 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 02:55:16,226 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-28 02:55:16,238 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 02:55:16,244 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;@6cd0321b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 02:55:16,244 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 02:55:16,248 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 02:55:16,249 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 02:55:16,249 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 02:55:16,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:16,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 02:55:16,250 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:55:16,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:16,255 INFO L85 PathProgramCache]: Analyzing trace with hash 585193627, now seen corresponding path program 1 times [2024-06-28 02:55:16,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:16,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374554554] [2024-06-28 02:55:16,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:16,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:16,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:17,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:17,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:17,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374554554] [2024-06-28 02:55:17,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374554554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:17,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:17,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 02:55:17,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613304013] [2024-06-28 02:55:17,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:17,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 02:55:17,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:17,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 02:55:17,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 02:55:17,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 02:55:17,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:17,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:17,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 02:55:17,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:18,552 INFO L124 PetriNetUnfolderBase]: 1955/2965 cut-off events. [2024-06-28 02:55:18,552 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2024-06-28 02:55:18,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5969 conditions, 2965 events. 1955/2965 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14230 event pairs, 1404 based on Foata normal form. 1/2875 useless extension candidates. Maximal degree in co-relation 5957. Up to 2893 conditions per place. [2024-06-28 02:55:18,571 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-28 02:55:18,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 177 flow [2024-06-28 02:55:18,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 02:55:18,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 02:55:18,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-28 02:55:18,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-28 02:55:18,582 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 71 transitions. [2024-06-28 02:55:18,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 177 flow [2024-06-28 02:55:18,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 02:55:18,587 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-28 02:55:18,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-28 02:55:18,591 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-28 02:55:18,591 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-28 02:55:18,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:18,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:18,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:18,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 02:55:18,592 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:55:18,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:18,593 INFO L85 PathProgramCache]: Analyzing trace with hash -269615622, now seen corresponding path program 1 times [2024-06-28 02:55:18,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:18,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148750119] [2024-06-28 02:55:18,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:18,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:19,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:19,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:19,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148750119] [2024-06-28 02:55:19,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148750119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:19,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:19,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 02:55:19,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760256326] [2024-06-28 02:55:19,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:19,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 02:55:19,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:19,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 02:55:19,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 02:55:19,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 02:55:19,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:19,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:19,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 02:55:19,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:20,431 INFO L124 PetriNetUnfolderBase]: 2246/3319 cut-off events. [2024-06-28 02:55:20,431 INFO L125 PetriNetUnfolderBase]: For 621/621 co-relation queries the response was YES. [2024-06-28 02:55:20,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7534 conditions, 3319 events. 2246/3319 cut-off events. For 621/621 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 15402 event pairs, 1443 based on Foata normal form. 3/3319 useless extension candidates. Maximal degree in co-relation 7522. Up to 3292 conditions per place. [2024-06-28 02:55:20,445 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 42 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-28 02:55:20,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 246 flow [2024-06-28 02:55:20,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:55:20,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:55:20,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-06-28 02:55:20,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-28 02:55:20,460 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 88 transitions. [2024-06-28 02:55:20,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 246 flow [2024-06-28 02:55:20,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 02:55:20,476 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-28 02:55:20,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-28 02:55:20,477 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-28 02:55:20,477 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-28 02:55:20,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:20,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:20,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:20,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 02:55:20,478 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:55:20,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:20,479 INFO L85 PathProgramCache]: Analyzing trace with hash 231851140, now seen corresponding path program 1 times [2024-06-28 02:55:20,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:20,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938962369] [2024-06-28 02:55:20,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:20,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:20,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:22,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:22,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:22,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938962369] [2024-06-28 02:55:22,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938962369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:22,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:22,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:55:22,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288100486] [2024-06-28 02:55:22,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:22,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:55:22,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:22,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:55:22,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:55:22,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 02:55:22,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:22,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:22,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 02:55:22,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:22,669 INFO L124 PetriNetUnfolderBase]: 2234/3301 cut-off events. [2024-06-28 02:55:22,670 INFO L125 PetriNetUnfolderBase]: For 1740/1740 co-relation queries the response was YES. [2024-06-28 02:55:22,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8266 conditions, 3301 events. 2234/3301 cut-off events. For 1740/1740 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 15269 event pairs, 1059 based on Foata normal form. 6/3304 useless extension candidates. Maximal degree in co-relation 8252. Up to 3244 conditions per place. [2024-06-28 02:55:22,686 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 50 selfloop transitions, 10 changer transitions 0/64 dead transitions. [2024-06-28 02:55:22,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 64 transitions, 328 flow [2024-06-28 02:55:22,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:55:22,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:55:22,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-06-28 02:55:22,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-06-28 02:55:22,689 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 108 transitions. [2024-06-28 02:55:22,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 64 transitions, 328 flow [2024-06-28 02:55:22,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 64 transitions, 314 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 02:55:22,692 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 174 flow [2024-06-28 02:55:22,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=174, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-28 02:55:22,692 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2024-06-28 02:55:22,693 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 174 flow [2024-06-28 02:55:22,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:22,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:22,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:22,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 02:55:22,693 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:55:22,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:22,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1184260269, now seen corresponding path program 1 times [2024-06-28 02:55:22,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:22,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900933263] [2024-06-28 02:55:22,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:22,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:22,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:25,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:25,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:25,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900933263] [2024-06-28 02:55:25,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900933263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:25,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:25,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:55:25,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728425096] [2024-06-28 02:55:25,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:25,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:55:25,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:25,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:55:25,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:55:25,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 02:55:25,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 174 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:25,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:25,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 02:55:25,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:25,628 INFO L124 PetriNetUnfolderBase]: 2225/3286 cut-off events. [2024-06-28 02:55:25,628 INFO L125 PetriNetUnfolderBase]: For 3244/3244 co-relation queries the response was YES. [2024-06-28 02:55:25,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8980 conditions, 3286 events. 2225/3286 cut-off events. For 3244/3244 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 15148 event pairs, 846 based on Foata normal form. 6/3289 useless extension candidates. Maximal degree in co-relation 8965. Up to 3199 conditions per place. [2024-06-28 02:55:25,644 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 54 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2024-06-28 02:55:25,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 70 transitions, 382 flow [2024-06-28 02:55:25,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:55:25,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:55:25,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-28 02:55:25,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-28 02:55:25,646 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 174 flow. Second operand 6 states and 123 transitions. [2024-06-28 02:55:25,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 70 transitions, 382 flow [2024-06-28 02:55:25,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 70 transitions, 358 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 02:55:25,648 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 193 flow [2024-06-28 02:55:25,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=193, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-06-28 02:55:25,649 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-28 02:55:25,650 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 193 flow [2024-06-28 02:55:25,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:25,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:25,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:25,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 02:55:25,651 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:55:25,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:25,651 INFO L85 PathProgramCache]: Analyzing trace with hash -654356127, now seen corresponding path program 1 times [2024-06-28 02:55:25,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:25,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17898412] [2024-06-28 02:55:25,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:25,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:25,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:26,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:26,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17898412] [2024-06-28 02:55:26,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17898412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:26,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:26,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:55:26,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134914540] [2024-06-28 02:55:26,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:26,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:55:26,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:26,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:55:26,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:55:26,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 02:55:26,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 193 flow. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:26,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:26,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 02:55:26,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:27,455 INFO L124 PetriNetUnfolderBase]: 1923/2928 cut-off events. [2024-06-28 02:55:27,455 INFO L125 PetriNetUnfolderBase]: For 4285/4285 co-relation queries the response was YES. [2024-06-28 02:55:27,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8425 conditions, 2928 events. 1923/2928 cut-off events. For 4285/4285 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14051 event pairs, 990 based on Foata normal form. 2/2891 useless extension candidates. Maximal degree in co-relation 8408. Up to 2835 conditions per place. [2024-06-28 02:55:27,478 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 45 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-28 02:55:27,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 57 transitions, 343 flow [2024-06-28 02:55:27,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:55:27,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:55:27,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-28 02:55:27,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-28 02:55:27,480 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 193 flow. Second operand 5 states and 87 transitions. [2024-06-28 02:55:27,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 57 transitions, 343 flow [2024-06-28 02:55:27,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 310 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-28 02:55:27,487 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 206 flow [2024-06-28 02:55:27,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=206, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-28 02:55:27,489 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-28 02:55:27,489 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 206 flow [2024-06-28 02:55:27,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:27,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:27,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:27,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 02:55:27,493 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:55:27,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:27,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1189797769, now seen corresponding path program 1 times [2024-06-28 02:55:27,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:27,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319017095] [2024-06-28 02:55:27,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:27,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:27,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:29,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:29,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:29,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319017095] [2024-06-28 02:55:29,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319017095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:29,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:29,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:55:29,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123545076] [2024-06-28 02:55:29,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:29,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:55:29,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:29,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:55:29,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:55:29,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 02:55:29,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 206 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:29,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:29,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 02:55:29,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:29,877 INFO L124 PetriNetUnfolderBase]: 1908/2921 cut-off events. [2024-06-28 02:55:29,877 INFO L125 PetriNetUnfolderBase]: For 6168/6168 co-relation queries the response was YES. [2024-06-28 02:55:29,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8931 conditions, 2921 events. 1908/2921 cut-off events. For 6168/6168 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14103 event pairs, 936 based on Foata normal form. 6/2914 useless extension candidates. Maximal degree in co-relation 8912. Up to 2787 conditions per place. [2024-06-28 02:55:29,892 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 51 selfloop transitions, 11 changer transitions 0/66 dead transitions. [2024-06-28 02:55:29,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 66 transitions, 392 flow [2024-06-28 02:55:29,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:55:29,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:55:29,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-28 02:55:29,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-28 02:55:29,893 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 206 flow. Second operand 6 states and 104 transitions. [2024-06-28 02:55:29,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 66 transitions, 392 flow [2024-06-28 02:55:29,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 66 transitions, 370 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-28 02:55:29,897 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 240 flow [2024-06-28 02:55:29,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=240, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-06-28 02:55:29,899 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-28 02:55:29,899 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 240 flow [2024-06-28 02:55:29,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:29,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:29,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:29,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 02:55:29,900 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:55:29,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:29,900 INFO L85 PathProgramCache]: Analyzing trace with hash -590380446, now seen corresponding path program 1 times [2024-06-28 02:55:29,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:29,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213919143] [2024-06-28 02:55:29,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:29,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:29,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:31,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:31,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:31,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213919143] [2024-06-28 02:55:31,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213919143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:31,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:31,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:55:31,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931620190] [2024-06-28 02:55:31,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:31,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:55:31,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:31,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:55:31,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:55:31,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:55:31,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 240 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:31,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:31,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:55:31,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:32,008 INFO L124 PetriNetUnfolderBase]: 2228/3294 cut-off events. [2024-06-28 02:55:32,008 INFO L125 PetriNetUnfolderBase]: For 9551/9557 co-relation queries the response was YES. [2024-06-28 02:55:32,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10932 conditions, 3294 events. 2228/3294 cut-off events. For 9551/9557 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15084 event pairs, 1135 based on Foata normal form. 6/3295 useless extension candidates. Maximal degree in co-relation 10912. Up to 3251 conditions per place. [2024-06-28 02:55:32,026 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 54 selfloop transitions, 16 changer transitions 0/73 dead transitions. [2024-06-28 02:55:32,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 73 transitions, 472 flow [2024-06-28 02:55:32,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:55:32,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:55:32,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-28 02:55:32,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-28 02:55:32,028 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 240 flow. Second operand 7 states and 108 transitions. [2024-06-28 02:55:32,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 73 transitions, 472 flow [2024-06-28 02:55:32,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 73 transitions, 438 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-28 02:55:32,033 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 318 flow [2024-06-28 02:55:32,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=318, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-06-28 02:55:32,034 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2024-06-28 02:55:32,034 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 318 flow [2024-06-28 02:55:32,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:32,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:32,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:32,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 02:55:32,035 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:55:32,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:32,035 INFO L85 PathProgramCache]: Analyzing trace with hash -2134467648, now seen corresponding path program 2 times [2024-06-28 02:55:32,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:32,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961877553] [2024-06-28 02:55:32,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:32,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:32,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:33,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:33,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:33,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961877553] [2024-06-28 02:55:33,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961877553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:33,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:33,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:55:33,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295402554] [2024-06-28 02:55:33,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:33,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:55:33,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:33,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:55:33,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:55:33,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:55:33,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 318 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:33,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:33,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:55:33,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:33,902 INFO L124 PetriNetUnfolderBase]: 2253/3331 cut-off events. [2024-06-28 02:55:33,902 INFO L125 PetriNetUnfolderBase]: For 12263/12263 co-relation queries the response was YES. [2024-06-28 02:55:33,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11819 conditions, 3331 events. 2253/3331 cut-off events. For 12263/12263 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15343 event pairs, 1113 based on Foata normal form. 2/3330 useless extension candidates. Maximal degree in co-relation 11796. Up to 3280 conditions per place. [2024-06-28 02:55:33,917 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 62 selfloop transitions, 24 changer transitions 0/89 dead transitions. [2024-06-28 02:55:33,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 89 transitions, 632 flow [2024-06-28 02:55:33,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:55:33,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:55:33,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-28 02:55:33,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-28 02:55:33,918 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 318 flow. Second operand 7 states and 115 transitions. [2024-06-28 02:55:33,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 89 transitions, 632 flow [2024-06-28 02:55:33,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 89 transitions, 581 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-28 02:55:33,923 INFO L231 Difference]: Finished difference. Result has 66 places, 69 transitions, 439 flow [2024-06-28 02:55:33,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=439, PETRI_PLACES=66, PETRI_TRANSITIONS=69} [2024-06-28 02:55:33,924 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-28 02:55:33,924 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 69 transitions, 439 flow [2024-06-28 02:55:33,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:33,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:33,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:33,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 02:55:33,925 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:55:33,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:33,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1776545694, now seen corresponding path program 3 times [2024-06-28 02:55:33,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:33,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316095252] [2024-06-28 02:55:33,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:33,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:33,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:35,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:35,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:35,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316095252] [2024-06-28 02:55:35,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316095252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:35,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:35,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:55:35,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545938740] [2024-06-28 02:55:35,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:35,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:55:35,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:35,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:55:35,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:55:35,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:55:35,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 439 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:35,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:35,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:55:35,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:35,961 INFO L124 PetriNetUnfolderBase]: 2248/3326 cut-off events. [2024-06-28 02:55:35,961 INFO L125 PetriNetUnfolderBase]: For 15930/15936 co-relation queries the response was YES. [2024-06-28 02:55:35,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12569 conditions, 3326 events. 2248/3326 cut-off events. For 15930/15936 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15323 event pairs, 1118 based on Foata normal form. 6/3324 useless extension candidates. Maximal degree in co-relation 12543. Up to 3246 conditions per place. [2024-06-28 02:55:35,978 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 54 selfloop transitions, 29 changer transitions 0/86 dead transitions. [2024-06-28 02:55:35,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 86 transitions, 681 flow [2024-06-28 02:55:35,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:55:35,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:55:35,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-28 02:55:35,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-28 02:55:35,980 INFO L175 Difference]: Start difference. First operand has 66 places, 69 transitions, 439 flow. Second operand 6 states and 99 transitions. [2024-06-28 02:55:35,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 86 transitions, 681 flow [2024-06-28 02:55:35,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 86 transitions, 629 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-28 02:55:35,986 INFO L231 Difference]: Finished difference. Result has 68 places, 72 transitions, 493 flow [2024-06-28 02:55:35,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=493, PETRI_PLACES=68, PETRI_TRANSITIONS=72} [2024-06-28 02:55:35,987 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-28 02:55:35,987 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 72 transitions, 493 flow [2024-06-28 02:55:35,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:35,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:35,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:35,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 02:55:35,988 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:55:35,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:35,989 INFO L85 PathProgramCache]: Analyzing trace with hash 281278446, now seen corresponding path program 1 times [2024-06-28 02:55:35,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:35,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696173000] [2024-06-28 02:55:35,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:35,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:37,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:37,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:37,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696173000] [2024-06-28 02:55:37,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696173000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:37,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:37,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:55:37,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726011637] [2024-06-28 02:55:37,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:37,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:55:37,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:37,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:55:37,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:55:37,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:55:37,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 72 transitions, 493 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:37,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:37,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:55:37,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:38,345 INFO L124 PetriNetUnfolderBase]: 2270/3356 cut-off events. [2024-06-28 02:55:38,345 INFO L125 PetriNetUnfolderBase]: For 19992/19992 co-relation queries the response was YES. [2024-06-28 02:55:38,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13449 conditions, 3356 events. 2270/3356 cut-off events. For 19992/19992 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15431 event pairs, 924 based on Foata normal form. 4/3357 useless extension candidates. Maximal degree in co-relation 13422. Up to 3262 conditions per place. [2024-06-28 02:55:38,361 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 75 selfloop transitions, 25 changer transitions 0/103 dead transitions. [2024-06-28 02:55:38,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 103 transitions, 813 flow [2024-06-28 02:55:38,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:55:38,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:55:38,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-28 02:55:38,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 02:55:38,363 INFO L175 Difference]: Start difference. First operand has 68 places, 72 transitions, 493 flow. Second operand 7 states and 119 transitions. [2024-06-28 02:55:38,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 103 transitions, 813 flow [2024-06-28 02:55:38,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 103 transitions, 731 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-28 02:55:38,371 INFO L231 Difference]: Finished difference. Result has 72 places, 78 transitions, 528 flow [2024-06-28 02:55:38,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=528, PETRI_PLACES=72, PETRI_TRANSITIONS=78} [2024-06-28 02:55:38,371 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 29 predicate places. [2024-06-28 02:55:38,371 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 78 transitions, 528 flow [2024-06-28 02:55:38,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:38,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:38,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:38,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 02:55:38,372 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:55:38,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:38,372 INFO L85 PathProgramCache]: Analyzing trace with hash 927720174, now seen corresponding path program 2 times [2024-06-28 02:55:38,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:38,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603887783] [2024-06-28 02:55:38,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:38,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:38,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:39,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:39,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:39,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603887783] [2024-06-28 02:55:39,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603887783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:39,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:39,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:55:39,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238577460] [2024-06-28 02:55:39,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:39,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:55:39,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:39,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:55:39,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:55:39,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:55:39,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 78 transitions, 528 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:39,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:39,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:55:39,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:40,808 INFO L124 PetriNetUnfolderBase]: 2308/3411 cut-off events. [2024-06-28 02:55:40,808 INFO L125 PetriNetUnfolderBase]: For 25187/25187 co-relation queries the response was YES. [2024-06-28 02:55:40,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14652 conditions, 3411 events. 2308/3411 cut-off events. For 25187/25187 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15695 event pairs, 908 based on Foata normal form. 4/3412 useless extension candidates. Maximal degree in co-relation 14623. Up to 3257 conditions per place. [2024-06-28 02:55:40,822 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 71 selfloop transitions, 35 changer transitions 0/109 dead transitions. [2024-06-28 02:55:40,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 109 transitions, 936 flow [2024-06-28 02:55:40,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:55:40,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:55:40,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-28 02:55:40,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-28 02:55:40,823 INFO L175 Difference]: Start difference. First operand has 72 places, 78 transitions, 528 flow. Second operand 7 states and 121 transitions. [2024-06-28 02:55:40,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 109 transitions, 936 flow [2024-06-28 02:55:40,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 109 transitions, 885 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-28 02:55:40,831 INFO L231 Difference]: Finished difference. Result has 76 places, 84 transitions, 643 flow [2024-06-28 02:55:40,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=643, PETRI_PLACES=76, PETRI_TRANSITIONS=84} [2024-06-28 02:55:40,832 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-28 02:55:40,832 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 84 transitions, 643 flow [2024-06-28 02:55:40,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:40,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:40,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:40,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 02:55:40,833 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:55:40,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:40,833 INFO L85 PathProgramCache]: Analyzing trace with hash 757017930, now seen corresponding path program 1 times [2024-06-28 02:55:40,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:40,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562466426] [2024-06-28 02:55:40,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:40,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:42,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:42,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:42,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562466426] [2024-06-28 02:55:42,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562466426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:42,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:42,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:55:42,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585380869] [2024-06-28 02:55:42,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:42,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:55:42,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:42,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:55:42,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:55:42,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:55:42,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 84 transitions, 643 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:42,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:42,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:55:42,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:43,570 INFO L124 PetriNetUnfolderBase]: 2330/3443 cut-off events. [2024-06-28 02:55:43,570 INFO L125 PetriNetUnfolderBase]: For 30877/30877 co-relation queries the response was YES. [2024-06-28 02:55:43,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15539 conditions, 3443 events. 2330/3443 cut-off events. For 30877/30877 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15814 event pairs, 901 based on Foata normal form. 4/3444 useless extension candidates. Maximal degree in co-relation 15509. Up to 3357 conditions per place. [2024-06-28 02:55:43,590 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 77 selfloop transitions, 28 changer transitions 0/108 dead transitions. [2024-06-28 02:55:43,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 108 transitions, 951 flow [2024-06-28 02:55:43,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:55:43,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:55:43,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-28 02:55:43,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-28 02:55:43,592 INFO L175 Difference]: Start difference. First operand has 76 places, 84 transitions, 643 flow. Second operand 7 states and 115 transitions. [2024-06-28 02:55:43,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 108 transitions, 951 flow [2024-06-28 02:55:43,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 108 transitions, 897 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-28 02:55:43,608 INFO L231 Difference]: Finished difference. Result has 80 places, 87 transitions, 697 flow [2024-06-28 02:55:43,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=697, PETRI_PLACES=80, PETRI_TRANSITIONS=87} [2024-06-28 02:55:43,609 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-28 02:55:43,609 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 87 transitions, 697 flow [2024-06-28 02:55:43,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:43,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:43,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:43,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 02:55:43,610 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:55:43,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:43,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1791477192, now seen corresponding path program 2 times [2024-06-28 02:55:43,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:43,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561759451] [2024-06-28 02:55:43,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:43,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:43,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:45,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:45,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561759451] [2024-06-28 02:55:45,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561759451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:45,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:45,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:55:45,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696957593] [2024-06-28 02:55:45,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:45,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:55:45,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:45,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:55:45,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:55:45,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:55:45,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 87 transitions, 697 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:45,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:45,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:55:45,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:46,230 INFO L124 PetriNetUnfolderBase]: 2363/3493 cut-off events. [2024-06-28 02:55:46,231 INFO L125 PetriNetUnfolderBase]: For 36070/36076 co-relation queries the response was YES. [2024-06-28 02:55:46,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16536 conditions, 3493 events. 2363/3493 cut-off events. For 36070/36076 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16171 event pairs, 819 based on Foata normal form. 10/3495 useless extension candidates. Maximal degree in co-relation 16504. Up to 3281 conditions per place. [2024-06-28 02:55:46,247 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 75 selfloop transitions, 39 changer transitions 0/117 dead transitions. [2024-06-28 02:55:46,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 117 transitions, 1127 flow [2024-06-28 02:55:46,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:55:46,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:55:46,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-28 02:55:46,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-28 02:55:46,249 INFO L175 Difference]: Start difference. First operand has 80 places, 87 transitions, 697 flow. Second operand 7 states and 120 transitions. [2024-06-28 02:55:46,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 117 transitions, 1127 flow [2024-06-28 02:55:46,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 117 transitions, 1047 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-28 02:55:46,262 INFO L231 Difference]: Finished difference. Result has 82 places, 93 transitions, 793 flow [2024-06-28 02:55:46,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=793, PETRI_PLACES=82, PETRI_TRANSITIONS=93} [2024-06-28 02:55:46,262 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-28 02:55:46,262 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 93 transitions, 793 flow [2024-06-28 02:55:46,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:46,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:46,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:46,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 02:55:46,263 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:55:46,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:46,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1791239856, now seen corresponding path program 3 times [2024-06-28 02:55:46,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:46,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425488451] [2024-06-28 02:55:46,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:46,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:47,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:47,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:47,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425488451] [2024-06-28 02:55:47,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425488451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:47,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:47,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:55:47,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436941124] [2024-06-28 02:55:47,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:47,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:55:47,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:47,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:55:47,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:55:48,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:55:48,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 93 transitions, 793 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:48,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:48,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:55:48,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:48,665 INFO L124 PetriNetUnfolderBase]: 2353/3481 cut-off events. [2024-06-28 02:55:48,665 INFO L125 PetriNetUnfolderBase]: For 41256/41262 co-relation queries the response was YES. [2024-06-28 02:55:48,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17127 conditions, 3481 events. 2353/3481 cut-off events. For 41256/41262 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16078 event pairs, 917 based on Foata normal form. 8/3479 useless extension candidates. Maximal degree in co-relation 17094. Up to 3287 conditions per place. [2024-06-28 02:55:48,689 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 77 selfloop transitions, 39 changer transitions 0/119 dead transitions. [2024-06-28 02:55:48,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 119 transitions, 1197 flow [2024-06-28 02:55:48,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:55:48,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:55:48,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-28 02:55:48,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-28 02:55:48,691 INFO L175 Difference]: Start difference. First operand has 82 places, 93 transitions, 793 flow. Second operand 7 states and 120 transitions. [2024-06-28 02:55:48,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 119 transitions, 1197 flow [2024-06-28 02:55:48,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 119 transitions, 1130 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-28 02:55:48,716 INFO L231 Difference]: Finished difference. Result has 86 places, 96 transitions, 868 flow [2024-06-28 02:55:48,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=868, PETRI_PLACES=86, PETRI_TRANSITIONS=96} [2024-06-28 02:55:48,717 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-28 02:55:48,717 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 96 transitions, 868 flow [2024-06-28 02:55:48,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:48,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:48,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:48,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 02:55:48,717 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:55:48,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:48,718 INFO L85 PathProgramCache]: Analyzing trace with hash 934149450, now seen corresponding path program 3 times [2024-06-28 02:55:48,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:48,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934871859] [2024-06-28 02:55:48,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:48,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:48,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:50,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:50,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:50,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934871859] [2024-06-28 02:55:50,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934871859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:50,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:50,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:55:50,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413884694] [2024-06-28 02:55:50,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:50,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:55:50,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:50,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:55:50,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:55:50,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:55:50,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 96 transitions, 868 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:50,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:50,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:55:50,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:51,672 INFO L124 PetriNetUnfolderBase]: 2343/3465 cut-off events. [2024-06-28 02:55:51,672 INFO L125 PetriNetUnfolderBase]: For 46145/46151 co-relation queries the response was YES. [2024-06-28 02:55:51,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17692 conditions, 3465 events. 2343/3465 cut-off events. For 46145/46151 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16022 event pairs, 906 based on Foata normal form. 8/3465 useless extension candidates. Maximal degree in co-relation 17657. Up to 3367 conditions per place. [2024-06-28 02:55:51,686 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 83 selfloop transitions, 32 changer transitions 0/118 dead transitions. [2024-06-28 02:55:51,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 118 transitions, 1198 flow [2024-06-28 02:55:51,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:55:51,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:55:51,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-28 02:55:51,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-28 02:55:51,688 INFO L175 Difference]: Start difference. First operand has 86 places, 96 transitions, 868 flow. Second operand 7 states and 114 transitions. [2024-06-28 02:55:51,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 118 transitions, 1198 flow [2024-06-28 02:55:51,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 118 transitions, 1080 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-28 02:55:51,707 INFO L231 Difference]: Finished difference. Result has 88 places, 99 transitions, 872 flow [2024-06-28 02:55:51,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=872, PETRI_PLACES=88, PETRI_TRANSITIONS=99} [2024-06-28 02:55:51,709 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-28 02:55:51,709 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 99 transitions, 872 flow [2024-06-28 02:55:51,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:51,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:51,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:51,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 02:55:51,710 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:55:51,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:51,710 INFO L85 PathProgramCache]: Analyzing trace with hash 434834212, now seen corresponding path program 1 times [2024-06-28 02:55:51,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:51,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537935772] [2024-06-28 02:55:51,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:51,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:52,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:52,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537935772] [2024-06-28 02:55:52,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537935772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:52,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:52,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:55:52,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718448587] [2024-06-28 02:55:52,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:52,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:55:52,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:52,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:55:52,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:55:52,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 02:55:52,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 99 transitions, 872 flow. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:52,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:52,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 02:55:52,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:53,355 INFO L124 PetriNetUnfolderBase]: 2043/3142 cut-off events. [2024-06-28 02:55:53,356 INFO L125 PetriNetUnfolderBase]: For 41983/41983 co-relation queries the response was YES. [2024-06-28 02:55:53,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16041 conditions, 3142 events. 2043/3142 cut-off events. For 41983/41983 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 15135 event pairs, 768 based on Foata normal form. 1/3140 useless extension candidates. Maximal degree in co-relation 16005. Up to 3018 conditions per place. [2024-06-28 02:55:53,372 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 96 selfloop transitions, 9 changer transitions 0/109 dead transitions. [2024-06-28 02:55:53,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 109 transitions, 1122 flow [2024-06-28 02:55:53,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:55:53,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:55:53,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-06-28 02:55:53,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-28 02:55:53,373 INFO L175 Difference]: Start difference. First operand has 88 places, 99 transitions, 872 flow. Second operand 5 states and 83 transitions. [2024-06-28 02:55:53,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 109 transitions, 1122 flow [2024-06-28 02:55:53,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 109 transitions, 1028 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-28 02:55:53,394 INFO L231 Difference]: Finished difference. Result has 88 places, 102 transitions, 828 flow [2024-06-28 02:55:53,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=828, PETRI_PLACES=88, PETRI_TRANSITIONS=102} [2024-06-28 02:55:53,395 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-28 02:55:53,395 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 102 transitions, 828 flow [2024-06-28 02:55:53,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:53,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:53,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:53,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 02:55:53,396 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:55:53,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:53,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1988905375, now seen corresponding path program 1 times [2024-06-28 02:55:53,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:53,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989402541] [2024-06-28 02:55:53,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:53,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:53,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:55,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:55,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:55,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989402541] [2024-06-28 02:55:55,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989402541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:55,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:55,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:55:55,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007401399] [2024-06-28 02:55:55,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:55,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:55:55,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:55,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:55:55,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:55:55,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:55:55,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 102 transitions, 828 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:55,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:55,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:55:55,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:56,090 INFO L124 PetriNetUnfolderBase]: 2335/3452 cut-off events. [2024-06-28 02:55:56,091 INFO L125 PetriNetUnfolderBase]: For 51909/51909 co-relation queries the response was YES. [2024-06-28 02:55:56,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18361 conditions, 3452 events. 2335/3452 cut-off events. For 51909/51909 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15890 event pairs, 897 based on Foata normal form. 2/3451 useless extension candidates. Maximal degree in co-relation 18324. Up to 3349 conditions per place. [2024-06-28 02:55:56,109 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 96 selfloop transitions, 27 changer transitions 0/126 dead transitions. [2024-06-28 02:55:56,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 126 transitions, 1148 flow [2024-06-28 02:55:56,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:55:56,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:55:56,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-28 02:55:56,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 02:55:56,111 INFO L175 Difference]: Start difference. First operand has 88 places, 102 transitions, 828 flow. Second operand 7 states and 119 transitions. [2024-06-28 02:55:56,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 126 transitions, 1148 flow [2024-06-28 02:55:56,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 126 transitions, 1100 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-28 02:55:56,130 INFO L231 Difference]: Finished difference. Result has 92 places, 102 transitions, 846 flow [2024-06-28 02:55:56,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=846, PETRI_PLACES=92, PETRI_TRANSITIONS=102} [2024-06-28 02:55:56,131 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-28 02:55:56,131 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 102 transitions, 846 flow [2024-06-28 02:55:56,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:56,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:56,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:56,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 02:55:56,132 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:55:56,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:56,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1988995740, now seen corresponding path program 1 times [2024-06-28 02:55:56,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:56,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607638942] [2024-06-28 02:55:56,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:56,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:58,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:58,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607638942] [2024-06-28 02:55:58,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607638942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:58,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:58,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:55:58,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764401107] [2024-06-28 02:55:58,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:58,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:55:58,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:58,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:55:58,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:55:58,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:55:58,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 102 transitions, 846 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:58,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:58,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:55:58,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:58,980 INFO L124 PetriNetUnfolderBase]: 2379/3516 cut-off events. [2024-06-28 02:55:58,980 INFO L125 PetriNetUnfolderBase]: For 58964/58964 co-relation queries the response was YES. [2024-06-28 02:55:58,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19062 conditions, 3516 events. 2379/3516 cut-off events. For 58964/58964 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16230 event pairs, 882 based on Foata normal form. 8/3521 useless extension candidates. Maximal degree in co-relation 19024. Up to 3376 conditions per place. [2024-06-28 02:55:59,001 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 105 selfloop transitions, 28 changer transitions 0/136 dead transitions. [2024-06-28 02:55:59,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 136 transitions, 1254 flow [2024-06-28 02:55:59,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:55:59,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:55:59,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 02:55:59,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-28 02:55:59,003 INFO L175 Difference]: Start difference. First operand has 92 places, 102 transitions, 846 flow. Second operand 8 states and 135 transitions. [2024-06-28 02:55:59,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 136 transitions, 1254 flow [2024-06-28 02:55:59,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 136 transitions, 1180 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 02:55:59,025 INFO L231 Difference]: Finished difference. Result has 94 places, 105 transitions, 888 flow [2024-06-28 02:55:59,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=888, PETRI_PLACES=94, PETRI_TRANSITIONS=105} [2024-06-28 02:55:59,025 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-28 02:55:59,025 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 105 transitions, 888 flow [2024-06-28 02:55:59,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:59,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:59,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:59,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 02:55:59,026 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:55:59,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:59,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1992714810, now seen corresponding path program 2 times [2024-06-28 02:55:59,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:59,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942493670] [2024-06-28 02:55:59,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:59,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:59,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:56:00,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:56:00,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:56:00,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942493670] [2024-06-28 02:56:00,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942493670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:56:00,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:56:00,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:56:00,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374235270] [2024-06-28 02:56:00,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:56:00,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:56:00,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:56:00,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:56:00,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:56:00,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:56:00,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 105 transitions, 888 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:56:00,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:56:00,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:56:00,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:56:01,954 INFO L124 PetriNetUnfolderBase]: 2423/3580 cut-off events. [2024-06-28 02:56:01,954 INFO L125 PetriNetUnfolderBase]: For 66640/66640 co-relation queries the response was YES. [2024-06-28 02:56:01,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20128 conditions, 3580 events. 2423/3580 cut-off events. For 66640/66640 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16596 event pairs, 889 based on Foata normal form. 8/3585 useless extension candidates. Maximal degree in co-relation 20089. Up to 3382 conditions per place. [2024-06-28 02:56:01,975 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 96 selfloop transitions, 38 changer transitions 0/137 dead transitions. [2024-06-28 02:56:01,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 137 transitions, 1298 flow [2024-06-28 02:56:01,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:56:01,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:56:01,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 02:56:01,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-28 02:56:01,977 INFO L175 Difference]: Start difference. First operand has 94 places, 105 transitions, 888 flow. Second operand 8 states and 135 transitions. [2024-06-28 02:56:01,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 137 transitions, 1298 flow [2024-06-28 02:56:02,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 137 transitions, 1206 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-28 02:56:02,020 INFO L231 Difference]: Finished difference. Result has 96 places, 108 transitions, 938 flow [2024-06-28 02:56:02,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=938, PETRI_PLACES=96, PETRI_TRANSITIONS=108} [2024-06-28 02:56:02,022 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-28 02:56:02,022 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 108 transitions, 938 flow [2024-06-28 02:56:02,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:56:02,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:56:02,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:56:02,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 02:56:02,023 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:56:02,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:56:02,025 INFO L85 PathProgramCache]: Analyzing trace with hash -419886488, now seen corresponding path program 3 times [2024-06-28 02:56:02,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:56:02,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197529229] [2024-06-28 02:56:02,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:56:02,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:56:02,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:56:03,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:56:03,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:56:03,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197529229] [2024-06-28 02:56:03,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197529229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:56:03,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:56:03,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:56:03,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871735320] [2024-06-28 02:56:03,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:56:03,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:56:03,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:56:03,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:56:03,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:56:04,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:56:04,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 108 transitions, 938 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:56:04,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:56:04,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:56:04,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:56:04,916 INFO L124 PetriNetUnfolderBase]: 2543/3755 cut-off events. [2024-06-28 02:56:04,916 INFO L125 PetriNetUnfolderBase]: For 77411/77411 co-relation queries the response was YES. [2024-06-28 02:56:04,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21897 conditions, 3755 events. 2543/3755 cut-off events. For 77411/77411 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 17496 event pairs, 905 based on Foata normal form. 12/3764 useless extension candidates. Maximal degree in co-relation 21857. Up to 3561 conditions per place. [2024-06-28 02:56:04,941 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 108 selfloop transitions, 37 changer transitions 0/148 dead transitions. [2024-06-28 02:56:04,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 148 transitions, 1558 flow [2024-06-28 02:56:04,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:56:04,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:56:04,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 02:56:04,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-28 02:56:04,943 INFO L175 Difference]: Start difference. First operand has 96 places, 108 transitions, 938 flow. Second operand 8 states and 137 transitions. [2024-06-28 02:56:04,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 148 transitions, 1558 flow [2024-06-28 02:56:04,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 148 transitions, 1440 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-28 02:56:04,980 INFO L231 Difference]: Finished difference. Result has 99 places, 118 transitions, 1098 flow [2024-06-28 02:56:04,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1098, PETRI_PLACES=99, PETRI_TRANSITIONS=118} [2024-06-28 02:56:04,980 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-28 02:56:04,981 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 118 transitions, 1098 flow [2024-06-28 02:56:04,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:56:04,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:56:04,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:56:04,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 02:56:04,981 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:56:04,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:56:04,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1098785432, now seen corresponding path program 4 times [2024-06-28 02:56:04,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:56:04,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531657542] [2024-06-28 02:56:04,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:56:04,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:56:04,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:56:06,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:56:06,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:56:06,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531657542] [2024-06-28 02:56:06,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531657542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:56:06,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:56:06,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:56:06,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929684656] [2024-06-28 02:56:06,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:56:06,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:56:06,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:56:06,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:56:06,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:56:07,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:56:07,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 118 transitions, 1098 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:56:07,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:56:07,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:56:07,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:56:07,961 INFO L124 PetriNetUnfolderBase]: 2737/4037 cut-off events. [2024-06-28 02:56:07,961 INFO L125 PetriNetUnfolderBase]: For 92111/92117 co-relation queries the response was YES. [2024-06-28 02:56:07,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24807 conditions, 4037 events. 2737/4037 cut-off events. For 92111/92117 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 18902 event pairs, 852 based on Foata normal form. 16/4045 useless extension candidates. Maximal degree in co-relation 24765. Up to 3535 conditions per place. [2024-06-28 02:56:07,989 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 103 selfloop transitions, 56 changer transitions 0/162 dead transitions. [2024-06-28 02:56:07,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 162 transitions, 1880 flow [2024-06-28 02:56:07,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:56:07,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:56:07,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 02:56:07,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-28 02:56:07,991 INFO L175 Difference]: Start difference. First operand has 99 places, 118 transitions, 1098 flow. Second operand 8 states and 143 transitions. [2024-06-28 02:56:07,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 162 transitions, 1880 flow [2024-06-28 02:56:08,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 162 transitions, 1789 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-28 02:56:08,022 INFO L231 Difference]: Finished difference. Result has 103 places, 128 transitions, 1328 flow [2024-06-28 02:56:08,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1007, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1328, PETRI_PLACES=103, PETRI_TRANSITIONS=128} [2024-06-28 02:56:08,023 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-28 02:56:08,023 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 128 transitions, 1328 flow [2024-06-28 02:56:08,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:56:08,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:56:08,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:56:08,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 02:56:08,024 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:56:08,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:56:08,024 INFO L85 PathProgramCache]: Analyzing trace with hash -306138086, now seen corresponding path program 5 times [2024-06-28 02:56:08,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:56:08,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129234133] [2024-06-28 02:56:08,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:56:08,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:56:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:56:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:56:10,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:56:10,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129234133] [2024-06-28 02:56:10,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129234133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:56:10,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:56:10,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:56:10,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895256357] [2024-06-28 02:56:10,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:56:10,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:56:10,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:56:10,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:56:10,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:56:10,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:56:10,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 128 transitions, 1328 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:56:10,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:56:10,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:56:10,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:56:11,369 INFO L124 PetriNetUnfolderBase]: 2813/4149 cut-off events. [2024-06-28 02:56:11,370 INFO L125 PetriNetUnfolderBase]: For 103410/103416 co-relation queries the response was YES. [2024-06-28 02:56:11,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26569 conditions, 4149 events. 2813/4149 cut-off events. For 103410/103416 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19567 event pairs, 741 based on Foata normal form. 12/4151 useless extension candidates. Maximal degree in co-relation 26525. Up to 3279 conditions per place. [2024-06-28 02:56:11,393 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 99 selfloop transitions, 78 changer transitions 0/180 dead transitions. [2024-06-28 02:56:11,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 180 transitions, 2344 flow [2024-06-28 02:56:11,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:56:11,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:56:11,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-28 02:56:11,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-28 02:56:11,397 INFO L175 Difference]: Start difference. First operand has 103 places, 128 transitions, 1328 flow. Second operand 8 states and 151 transitions. [2024-06-28 02:56:11,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 180 transitions, 2344 flow [2024-06-28 02:56:11,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 180 transitions, 2207 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-28 02:56:11,441 INFO L231 Difference]: Finished difference. Result has 109 places, 141 transitions, 1662 flow [2024-06-28 02:56:11,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1211, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1662, PETRI_PLACES=109, PETRI_TRANSITIONS=141} [2024-06-28 02:56:11,441 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-28 02:56:11,441 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 141 transitions, 1662 flow [2024-06-28 02:56:11,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:56:11,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:56:11,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:56:11,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 02:56:11,442 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:56:11,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:56:11,442 INFO L85 PathProgramCache]: Analyzing trace with hash -306132506, now seen corresponding path program 6 times [2024-06-28 02:56:11,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:56:11,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903161256] [2024-06-28 02:56:11,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:56:11,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:56:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:56:13,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:56:13,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:56:13,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903161256] [2024-06-28 02:56:13,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903161256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:56:13,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:56:13,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:56:13,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142739988] [2024-06-28 02:56:13,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:56:13,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:56:13,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:56:13,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:56:13,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:56:13,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:56:13,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 141 transitions, 1662 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:56:13,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:56:13,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:56:13,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:56:14,152 INFO L124 PetriNetUnfolderBase]: 2789/4115 cut-off events. [2024-06-28 02:56:14,152 INFO L125 PetriNetUnfolderBase]: For 109461/109467 co-relation queries the response was YES. [2024-06-28 02:56:14,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26866 conditions, 4115 events. 2789/4115 cut-off events. For 109461/109467 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 19401 event pairs, 940 based on Foata normal form. 16/4123 useless extension candidates. Maximal degree in co-relation 26819. Up to 3909 conditions per place. [2024-06-28 02:56:14,181 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 125 selfloop transitions, 41 changer transitions 0/169 dead transitions. [2024-06-28 02:56:14,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 169 transitions, 2162 flow [2024-06-28 02:56:14,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:56:14,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:56:14,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 02:56:14,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 02:56:14,183 INFO L175 Difference]: Start difference. First operand has 109 places, 141 transitions, 1662 flow. Second operand 8 states and 136 transitions. [2024-06-28 02:56:14,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 169 transitions, 2162 flow [2024-06-28 02:56:14,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 169 transitions, 1971 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-28 02:56:14,255 INFO L231 Difference]: Finished difference. Result has 113 places, 141 transitions, 1563 flow [2024-06-28 02:56:14,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1471, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1563, PETRI_PLACES=113, PETRI_TRANSITIONS=141} [2024-06-28 02:56:14,255 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 70 predicate places. [2024-06-28 02:56:14,255 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 141 transitions, 1563 flow [2024-06-28 02:56:14,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:56:14,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:56:14,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:56:14,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 02:56:14,256 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:56:14,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:56:14,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1098508385, now seen corresponding path program 1 times [2024-06-28 02:56:14,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:56:14,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451000797] [2024-06-28 02:56:14,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:56:14,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:56:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:56:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:56:17,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:56:17,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451000797] [2024-06-28 02:56:17,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451000797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:56:17,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:56:17,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:56:17,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118432938] [2024-06-28 02:56:17,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:56:17,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:56:17,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:56:17,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:56:17,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:56:17,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 02:56:17,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 141 transitions, 1563 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:56:17,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:56:17,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 02:56:17,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:56:18,325 INFO L124 PetriNetUnfolderBase]: 2484/3767 cut-off events. [2024-06-28 02:56:18,325 INFO L125 PetriNetUnfolderBase]: For 94085/94085 co-relation queries the response was YES. [2024-06-28 02:56:18,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23546 conditions, 3767 events. 2484/3767 cut-off events. For 94085/94085 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 18342 event pairs, 733 based on Foata normal form. 4/3768 useless extension candidates. Maximal degree in co-relation 23499. Up to 3609 conditions per place. [2024-06-28 02:56:18,350 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 152 selfloop transitions, 20 changer transitions 0/176 dead transitions. [2024-06-28 02:56:18,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 176 transitions, 2095 flow [2024-06-28 02:56:18,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:56:18,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:56:18,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-28 02:56:18,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-28 02:56:18,352 INFO L175 Difference]: Start difference. First operand has 113 places, 141 transitions, 1563 flow. Second operand 9 states and 147 transitions. [2024-06-28 02:56:18,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 176 transitions, 2095 flow [2024-06-28 02:56:18,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 176 transitions, 1978 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 02:56:18,395 INFO L231 Difference]: Finished difference. Result has 117 places, 149 transitions, 1617 flow [2024-06-28 02:56:18,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1450, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1617, PETRI_PLACES=117, PETRI_TRANSITIONS=149} [2024-06-28 02:56:18,396 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-28 02:56:18,396 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 149 transitions, 1617 flow [2024-06-28 02:56:18,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:56:18,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:56:18,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:56:18,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 02:56:18,397 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:56:18,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:56:18,397 INFO L85 PathProgramCache]: Analyzing trace with hash 594960277, now seen corresponding path program 1 times [2024-06-28 02:56:18,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:56:18,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374375870] [2024-06-28 02:56:18,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:56:18,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:56:18,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:56:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:56:19,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:56:19,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374375870] [2024-06-28 02:56:19,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374375870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:56:19,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:56:19,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:56:19,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817816840] [2024-06-28 02:56:19,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:56:19,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:56:19,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:56:19,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:56:19,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:56:19,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 02:56:19,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 149 transitions, 1617 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:56:19,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:56:19,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 02:56:19,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:56:20,617 INFO L124 PetriNetUnfolderBase]: 2478/3759 cut-off events. [2024-06-28 02:56:20,618 INFO L125 PetriNetUnfolderBase]: For 100005/100005 co-relation queries the response was YES. [2024-06-28 02:56:20,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24030 conditions, 3759 events. 2478/3759 cut-off events. For 100005/100005 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 18293 event pairs, 756 based on Foata normal form. 2/3758 useless extension candidates. Maximal degree in co-relation 23980. Up to 3646 conditions per place. [2024-06-28 02:56:20,645 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 145 selfloop transitions, 12 changer transitions 0/161 dead transitions. [2024-06-28 02:56:20,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 161 transitions, 1981 flow [2024-06-28 02:56:20,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:56:20,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:56:20,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-28 02:56:20,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 02:56:20,646 INFO L175 Difference]: Start difference. First operand has 117 places, 149 transitions, 1617 flow. Second operand 6 states and 96 transitions. [2024-06-28 02:56:20,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 161 transitions, 1981 flow [2024-06-28 02:56:20,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 161 transitions, 1890 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-28 02:56:20,701 INFO L231 Difference]: Finished difference. Result has 118 places, 152 transitions, 1588 flow [2024-06-28 02:56:20,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1526, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1588, PETRI_PLACES=118, PETRI_TRANSITIONS=152} [2024-06-28 02:56:20,701 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-28 02:56:20,702 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 152 transitions, 1588 flow [2024-06-28 02:56:20,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:56:20,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:56:20,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:56:20,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 02:56:20,702 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:56:20,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:56:20,703 INFO L85 PathProgramCache]: Analyzing trace with hash -249904053, now seen corresponding path program 1 times [2024-06-28 02:56:20,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:56:20,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263982187] [2024-06-28 02:56:20,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:56:20,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:56:20,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:56:22,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:56:22,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:56:22,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263982187] [2024-06-28 02:56:22,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263982187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:56:22,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:56:22,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:56:22,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554985492] [2024-06-28 02:56:22,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:56:22,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:56:22,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:56:22,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:56:22,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:56:22,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:56:22,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 152 transitions, 1588 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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) [2024-06-28 02:56:22,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:56:22,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:56:22,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:56:23,959 INFO L124 PetriNetUnfolderBase]: 2789/4116 cut-off events. [2024-06-28 02:56:23,959 INFO L125 PetriNetUnfolderBase]: For 121865/121865 co-relation queries the response was YES. [2024-06-28 02:56:23,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27257 conditions, 4116 events. 2789/4116 cut-off events. For 121865/121865 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 19339 event pairs, 654 based on Foata normal form. 4/4117 useless extension candidates. Maximal degree in co-relation 27206. Up to 3987 conditions per place. [2024-06-28 02:56:23,992 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 155 selfloop transitions, 25 changer transitions 0/183 dead transitions. [2024-06-28 02:56:23,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 183 transitions, 2088 flow [2024-06-28 02:56:23,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:56:23,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:56:23,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 02:56:23,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-28 02:56:23,994 INFO L175 Difference]: Start difference. First operand has 118 places, 152 transitions, 1588 flow. Second operand 8 states and 132 transitions. [2024-06-28 02:56:23,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 183 transitions, 2088 flow [2024-06-28 02:56:24,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 183 transitions, 2048 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 02:56:24,064 INFO L231 Difference]: Finished difference. Result has 122 places, 154 transitions, 1663 flow [2024-06-28 02:56:24,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1548, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1663, PETRI_PLACES=122, PETRI_TRANSITIONS=154} [2024-06-28 02:56:24,065 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-28 02:56:24,066 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 154 transitions, 1663 flow [2024-06-28 02:56:24,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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) [2024-06-28 02:56:24,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:56:24,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:56:24,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 02:56:24,066 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:56:24,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:56:24,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1469777427, now seen corresponding path program 1 times [2024-06-28 02:56:24,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:56:24,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42367337] [2024-06-28 02:56:24,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:56:24,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:56:24,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:56:26,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:56:26,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:56:26,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42367337] [2024-06-28 02:56:26,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42367337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:56:26,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:56:26,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:56:26,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813379716] [2024-06-28 02:56:26,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:56:26,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:56:26,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:56:26,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:56:26,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:56:26,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:56:26,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 154 transitions, 1663 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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) [2024-06-28 02:56:26,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:56:26,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:56:26,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:56:27,416 INFO L124 PetriNetUnfolderBase]: 2912/4300 cut-off events. [2024-06-28 02:56:27,416 INFO L125 PetriNetUnfolderBase]: For 132918/132918 co-relation queries the response was YES. [2024-06-28 02:56:27,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28671 conditions, 4300 events. 2912/4300 cut-off events. For 132918/132918 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 20353 event pairs, 824 based on Foata normal form. 4/4295 useless extension candidates. Maximal degree in co-relation 28619. Up to 4113 conditions per place. [2024-06-28 02:56:27,450 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 159 selfloop transitions, 39 changer transitions 0/201 dead transitions. [2024-06-28 02:56:27,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 201 transitions, 2363 flow [2024-06-28 02:56:27,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:56:27,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:56:27,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-28 02:56:27,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-28 02:56:27,451 INFO L175 Difference]: Start difference. First operand has 122 places, 154 transitions, 1663 flow. Second operand 9 states and 145 transitions. [2024-06-28 02:56:27,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 201 transitions, 2363 flow [2024-06-28 02:56:27,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 201 transitions, 2254 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-28 02:56:27,527 INFO L231 Difference]: Finished difference. Result has 127 places, 173 transitions, 1895 flow [2024-06-28 02:56:27,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1566, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1895, PETRI_PLACES=127, PETRI_TRANSITIONS=173} [2024-06-28 02:56:27,528 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-28 02:56:27,528 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 173 transitions, 1895 flow [2024-06-28 02:56:27,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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) [2024-06-28 02:56:27,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:56:27,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:56:27,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 02:56:27,529 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:56:27,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:56:27,529 INFO L85 PathProgramCache]: Analyzing trace with hash -249843603, now seen corresponding path program 2 times [2024-06-28 02:56:27,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:56:27,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933513926] [2024-06-28 02:56:27,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:56:27,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:56:27,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:56:29,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:56:29,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:56:29,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933513926] [2024-06-28 02:56:29,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933513926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:56:29,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:56:29,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:56:29,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110328671] [2024-06-28 02:56:29,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:56:29,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:56:29,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:56:29,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:56:29,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:56:29,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:56:29,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 173 transitions, 1895 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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) [2024-06-28 02:56:29,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:56:29,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:56:29,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:56:30,536 INFO L124 PetriNetUnfolderBase]: 2929/4330 cut-off events. [2024-06-28 02:56:30,537 INFO L125 PetriNetUnfolderBase]: For 143874/143874 co-relation queries the response was YES. [2024-06-28 02:56:30,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29429 conditions, 4330 events. 2929/4330 cut-off events. For 143874/143874 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 20589 event pairs, 833 based on Foata normal form. 4/4331 useless extension candidates. Maximal degree in co-relation 29374. Up to 4144 conditions per place. [2024-06-28 02:56:30,565 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 159 selfloop transitions, 41 changer transitions 0/203 dead transitions. [2024-06-28 02:56:30,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 203 transitions, 2437 flow [2024-06-28 02:56:30,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:56:30,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:56:30,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-28 02:56:30,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-28 02:56:30,567 INFO L175 Difference]: Start difference. First operand has 127 places, 173 transitions, 1895 flow. Second operand 8 states and 133 transitions. [2024-06-28 02:56:30,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 203 transitions, 2437 flow [2024-06-28 02:56:30,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 203 transitions, 2338 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-28 02:56:30,661 INFO L231 Difference]: Finished difference. Result has 132 places, 175 transitions, 1950 flow [2024-06-28 02:56:30,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1796, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1950, PETRI_PLACES=132, PETRI_TRANSITIONS=175} [2024-06-28 02:56:30,662 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-28 02:56:30,662 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 175 transitions, 1950 flow [2024-06-28 02:56:30,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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) [2024-06-28 02:56:30,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:56:30,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:56:30,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 02:56:30,663 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:56:30,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:56:30,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1644613263, now seen corresponding path program 3 times [2024-06-28 02:56:30,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:56:30,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241435286] [2024-06-28 02:56:30,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:56:30,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:56:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:56:32,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:56:32,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:56:32,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241435286] [2024-06-28 02:56:32,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241435286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:56:32,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:56:32,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:56:32,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167494048] [2024-06-28 02:56:32,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:56:32,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:56:32,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:56:32,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:56:32,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:56:32,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:56:32,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 175 transitions, 1950 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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) [2024-06-28 02:56:32,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:56:32,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:56:32,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:56:34,076 INFO L124 PetriNetUnfolderBase]: 2946/4354 cut-off events. [2024-06-28 02:56:34,077 INFO L125 PetriNetUnfolderBase]: For 153942/153942 co-relation queries the response was YES. [2024-06-28 02:56:34,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30036 conditions, 4354 events. 2946/4354 cut-off events. For 153942/153942 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 20673 event pairs, 811 based on Foata normal form. 4/4355 useless extension candidates. Maximal degree in co-relation 29979. Up to 4137 conditions per place. [2024-06-28 02:56:34,105 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 152 selfloop transitions, 49 changer transitions 0/204 dead transitions. [2024-06-28 02:56:34,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 204 transitions, 2496 flow [2024-06-28 02:56:34,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:56:34,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:56:34,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-28 02:56:34,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-28 02:56:34,107 INFO L175 Difference]: Start difference. First operand has 132 places, 175 transitions, 1950 flow. Second operand 8 states and 133 transitions. [2024-06-28 02:56:34,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 204 transitions, 2496 flow [2024-06-28 02:56:34,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 204 transitions, 2366 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-28 02:56:34,194 INFO L231 Difference]: Finished difference. Result has 134 places, 177 transitions, 1991 flow [2024-06-28 02:56:34,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1820, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1991, PETRI_PLACES=134, PETRI_TRANSITIONS=177} [2024-06-28 02:56:34,197 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-28 02:56:34,197 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 177 transitions, 1991 flow [2024-06-28 02:56:34,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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) [2024-06-28 02:56:34,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:56:34,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:56:34,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 02:56:34,198 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:56:34,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:56:34,198 INFO L85 PathProgramCache]: Analyzing trace with hash -131571225, now seen corresponding path program 1 times [2024-06-28 02:56:34,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:56:34,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77762540] [2024-06-28 02:56:34,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:56:34,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:56:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:56:37,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:56:37,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:56:37,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77762540] [2024-06-28 02:56:37,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77762540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:56:37,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:56:37,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:56:37,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147078217] [2024-06-28 02:56:37,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:56:37,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:56:37,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:56:37,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:56:37,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:56:37,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:56:37,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 177 transitions, 1991 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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) [2024-06-28 02:56:37,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:56:37,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:56:37,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:56:38,501 INFO L124 PetriNetUnfolderBase]: 2935/4339 cut-off events. [2024-06-28 02:56:38,501 INFO L125 PetriNetUnfolderBase]: For 161876/161876 co-relation queries the response was YES. [2024-06-28 02:56:38,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30284 conditions, 4339 events. 2935/4339 cut-off events. For 161876/161876 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 20617 event pairs, 851 based on Foata normal form. 2/4338 useless extension candidates. Maximal degree in co-relation 30226. Up to 4238 conditions per place. [2024-06-28 02:56:38,533 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 171 selfloop transitions, 34 changer transitions 0/208 dead transitions. [2024-06-28 02:56:38,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 208 transitions, 2508 flow [2024-06-28 02:56:38,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:56:38,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:56:38,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-28 02:56:38,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-28 02:56:38,534 INFO L175 Difference]: Start difference. First operand has 134 places, 177 transitions, 1991 flow. Second operand 9 states and 142 transitions. [2024-06-28 02:56:38,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 208 transitions, 2508 flow [2024-06-28 02:56:38,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 208 transitions, 2355 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-28 02:56:38,664 INFO L231 Difference]: Finished difference. Result has 138 places, 180 transitions, 1945 flow [2024-06-28 02:56:38,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1838, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1945, PETRI_PLACES=138, PETRI_TRANSITIONS=180} [2024-06-28 02:56:38,665 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-28 02:56:38,665 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 180 transitions, 1945 flow [2024-06-28 02:56:38,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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) [2024-06-28 02:56:38,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:56:38,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:56:38,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 02:56:38,666 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:56:38,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:56:38,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1251505987, now seen corresponding path program 1 times [2024-06-28 02:56:38,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:56:38,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079501515] [2024-06-28 02:56:38,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:56:38,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:56:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:56:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:56:39,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:56:39,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079501515] [2024-06-28 02:56:39,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079501515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:56:39,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:56:39,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:56:39,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687119041] [2024-06-28 02:56:39,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:56:39,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:56:39,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:56:39,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:56:39,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:56:39,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:56:39,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 180 transitions, 1945 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:56:39,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:56:39,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:56:39,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:56:40,911 INFO L124 PetriNetUnfolderBase]: 2940/4346 cut-off events. [2024-06-28 02:56:40,912 INFO L125 PetriNetUnfolderBase]: For 168244/168244 co-relation queries the response was YES. [2024-06-28 02:56:40,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30625 conditions, 4346 events. 2940/4346 cut-off events. For 168244/168244 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 20603 event pairs, 850 based on Foata normal form. 1/4344 useless extension candidates. Maximal degree in co-relation 30565. Up to 4296 conditions per place. [2024-06-28 02:56:40,955 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 174 selfloop transitions, 19 changer transitions 0/196 dead transitions. [2024-06-28 02:56:40,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 196 transitions, 2401 flow [2024-06-28 02:56:40,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:56:40,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:56:40,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-28 02:56:40,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 02:56:40,957 INFO L175 Difference]: Start difference. First operand has 138 places, 180 transitions, 1945 flow. Second operand 6 states and 96 transitions. [2024-06-28 02:56:40,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 196 transitions, 2401 flow [2024-06-28 02:56:41,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 196 transitions, 2299 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-28 02:56:41,106 INFO L231 Difference]: Finished difference. Result has 138 places, 183 transitions, 1927 flow [2024-06-28 02:56:41,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1843, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1927, PETRI_PLACES=138, PETRI_TRANSITIONS=183} [2024-06-28 02:56:41,107 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-28 02:56:41,107 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 183 transitions, 1927 flow [2024-06-28 02:56:41,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:56:41,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:56:41,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:56:41,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 02:56:41,108 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:56:41,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:56:41,108 INFO L85 PathProgramCache]: Analyzing trace with hash -900349777, now seen corresponding path program 4 times [2024-06-28 02:56:41,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:56:41,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672584716] [2024-06-28 02:56:41,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:56:41,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:56:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:56:43,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:56:43,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:56:43,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672584716] [2024-06-28 02:56:43,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672584716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:56:43,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:56:43,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:56:43,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935155431] [2024-06-28 02:56:43,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:56:43,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:56:43,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:56:43,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:56:43,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:56:43,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:56:43,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 183 transitions, 1927 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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) [2024-06-28 02:56:43,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:56:43,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:56:43,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:56:44,470 INFO L124 PetriNetUnfolderBase]: 2932/4336 cut-off events. [2024-06-28 02:56:44,470 INFO L125 PetriNetUnfolderBase]: For 176520/176526 co-relation queries the response was YES. [2024-06-28 02:56:44,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30932 conditions, 4336 events. 2932/4336 cut-off events. For 176520/176526 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 20548 event pairs, 777 based on Foata normal form. 8/4330 useless extension candidates. Maximal degree in co-relation 30871. Up to 4079 conditions per place. [2024-06-28 02:56:44,500 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 154 selfloop transitions, 53 changer transitions 0/210 dead transitions. [2024-06-28 02:56:44,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 210 transitions, 2483 flow [2024-06-28 02:56:44,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:56:44,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:56:44,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 02:56:44,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-28 02:56:44,502 INFO L175 Difference]: Start difference. First operand has 138 places, 183 transitions, 1927 flow. Second operand 8 states and 132 transitions. [2024-06-28 02:56:44,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 210 transitions, 2483 flow [2024-06-28 02:56:44,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 210 transitions, 2425 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 02:56:44,593 INFO L231 Difference]: Finished difference. Result has 142 places, 185 transitions, 2052 flow [2024-06-28 02:56:44,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1869, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2052, PETRI_PLACES=142, PETRI_TRANSITIONS=185} [2024-06-28 02:56:44,594 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-28 02:56:44,595 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 185 transitions, 2052 flow [2024-06-28 02:56:44,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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) [2024-06-28 02:56:44,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:56:44,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:56:44,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 02:56:44,595 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:56:44,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:56:44,596 INFO L85 PathProgramCache]: Analyzing trace with hash 69496841, now seen corresponding path program 2 times [2024-06-28 02:56:44,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:56:44,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099080571] [2024-06-28 02:56:44,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:56:44,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:56:44,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:56:47,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:56:47,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:56:47,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099080571] [2024-06-28 02:56:47,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099080571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:56:47,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:56:47,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:56:47,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398238029] [2024-06-28 02:56:47,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:56:47,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:56:47,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:56:47,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:56:47,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:56:47,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:56:47,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 185 transitions, 2052 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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) [2024-06-28 02:56:47,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:56:47,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:56:47,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:56:48,570 INFO L124 PetriNetUnfolderBase]: 2921/4313 cut-off events. [2024-06-28 02:56:48,571 INFO L125 PetriNetUnfolderBase]: For 185361/185373 co-relation queries the response was YES. [2024-06-28 02:56:48,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31383 conditions, 4313 events. 2921/4313 cut-off events. For 185361/185373 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 20394 event pairs, 802 based on Foata normal form. 10/4315 useless extension candidates. Maximal degree in co-relation 31321. Up to 4206 conditions per place. [2024-06-28 02:56:48,601 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 170 selfloop transitions, 37 changer transitions 0/210 dead transitions. [2024-06-28 02:56:48,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 210 transitions, 2559 flow [2024-06-28 02:56:48,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:56:48,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:56:48,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-28 02:56:48,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 02:56:48,603 INFO L175 Difference]: Start difference. First operand has 142 places, 185 transitions, 2052 flow. Second operand 8 states and 128 transitions. [2024-06-28 02:56:48,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 210 transitions, 2559 flow [2024-06-28 02:56:48,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 210 transitions, 2368 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-28 02:56:48,709 INFO L231 Difference]: Finished difference. Result has 145 places, 188 transitions, 1978 flow [2024-06-28 02:56:48,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1861, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1978, PETRI_PLACES=145, PETRI_TRANSITIONS=188} [2024-06-28 02:56:48,710 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-28 02:56:48,710 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 188 transitions, 1978 flow [2024-06-28 02:56:48,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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) [2024-06-28 02:56:48,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:56:48,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:56:48,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 02:56:48,710 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:56:48,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:56:48,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1263886147, now seen corresponding path program 2 times [2024-06-28 02:56:48,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:56:48,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673127845] [2024-06-28 02:56:48,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:56:48,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:56:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:56:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:56:50,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:56:50,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673127845] [2024-06-28 02:56:50,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673127845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:56:50,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:56:50,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:56:50,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125082934] [2024-06-28 02:56:50,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:56:50,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:56:50,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:56:50,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:56:50,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:56:50,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:56:50,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 188 transitions, 1978 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:56:50,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:56:50,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:56:50,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:56:51,202 INFO L124 PetriNetUnfolderBase]: 2918/4309 cut-off events. [2024-06-28 02:56:51,202 INFO L125 PetriNetUnfolderBase]: For 192502/192514 co-relation queries the response was YES. [2024-06-28 02:56:51,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31560 conditions, 4309 events. 2918/4309 cut-off events. For 192502/192514 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 20360 event pairs, 797 based on Foata normal form. 9/4310 useless extension candidates. Maximal degree in co-relation 31496. Up to 4257 conditions per place. [2024-06-28 02:56:51,238 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 171 selfloop transitions, 25 changer transitions 0/199 dead transitions. [2024-06-28 02:56:51,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 199 transitions, 2430 flow [2024-06-28 02:56:51,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:56:51,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:56:51,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2024-06-28 02:56:51,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3435374149659864 [2024-06-28 02:56:51,239 INFO L175 Difference]: Start difference. First operand has 145 places, 188 transitions, 1978 flow. Second operand 7 states and 101 transitions. [2024-06-28 02:56:51,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 199 transitions, 2430 flow [2024-06-28 02:56:51,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 199 transitions, 2328 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 02:56:51,372 INFO L231 Difference]: Finished difference. Result has 146 places, 191 transitions, 1976 flow [2024-06-28 02:56:51,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1876, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1976, PETRI_PLACES=146, PETRI_TRANSITIONS=191} [2024-06-28 02:56:51,373 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-28 02:56:51,373 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 191 transitions, 1976 flow [2024-06-28 02:56:51,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:56:51,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:56:51,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:56:51,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 02:56:51,373 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:56:51,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:56:51,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1051938101, now seen corresponding path program 2 times [2024-06-28 02:56:51,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:56:51,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766794869] [2024-06-28 02:56:51,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:56:51,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:56:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:56:53,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:56:53,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:56:53,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766794869] [2024-06-28 02:56:53,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766794869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:56:53,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:56:53,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:56:53,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806367625] [2024-06-28 02:56:53,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:56:53,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:56:53,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:56:53,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:56:53,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:56:53,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:56:53,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 191 transitions, 1976 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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) [2024-06-28 02:56:53,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:56:53,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:56:53,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:56:54,906 INFO L124 PetriNetUnfolderBase]: 3132/4623 cut-off events. [2024-06-28 02:56:54,907 INFO L125 PetriNetUnfolderBase]: For 205176/205180 co-relation queries the response was YES. [2024-06-28 02:56:54,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33742 conditions, 4623 events. 3132/4623 cut-off events. For 205176/205180 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 22079 event pairs, 806 based on Foata normal form. 8/4628 useless extension candidates. Maximal degree in co-relation 33677. Up to 4353 conditions per place. [2024-06-28 02:56:54,940 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 194 selfloop transitions, 68 changer transitions 0/265 dead transitions. [2024-06-28 02:56:54,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 265 transitions, 3058 flow [2024-06-28 02:56:54,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:56:54,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:56:54,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-28 02:56:54,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-28 02:56:54,941 INFO L175 Difference]: Start difference. First operand has 146 places, 191 transitions, 1976 flow. Second operand 9 states and 152 transitions. [2024-06-28 02:56:54,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 265 transitions, 3058 flow [2024-06-28 02:56:55,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 265 transitions, 2980 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-28 02:56:55,067 INFO L231 Difference]: Finished difference. Result has 152 places, 231 transitions, 2578 flow [2024-06-28 02:56:55,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1898, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2578, PETRI_PLACES=152, PETRI_TRANSITIONS=231} [2024-06-28 02:56:55,068 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-28 02:56:55,068 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 231 transitions, 2578 flow [2024-06-28 02:56:55,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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) [2024-06-28 02:56:55,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:56:55,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:56:55,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 02:56:55,069 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:56:55,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:56:55,069 INFO L85 PathProgramCache]: Analyzing trace with hash 987746247, now seen corresponding path program 3 times [2024-06-28 02:56:55,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:56:55,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048311325] [2024-06-28 02:56:55,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:56:55,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:56:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:56:56,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:56:56,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:56:56,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048311325] [2024-06-28 02:56:56,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048311325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:56:56,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:56:56,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:56:56,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703788022] [2024-06-28 02:56:56,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:56:56,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:56:56,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:56:56,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:56:56,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:56:57,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:56:57,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 231 transitions, 2578 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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) [2024-06-28 02:56:57,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:56:57,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:56:57,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:56:58,229 INFO L124 PetriNetUnfolderBase]: 3262/4811 cut-off events. [2024-06-28 02:56:58,230 INFO L125 PetriNetUnfolderBase]: For 217569/217577 co-relation queries the response was YES. [2024-06-28 02:56:58,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35818 conditions, 4811 events. 3262/4811 cut-off events. For 217569/217577 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 23177 event pairs, 810 based on Foata normal form. 12/4820 useless extension candidates. Maximal degree in co-relation 35750. Up to 4481 conditions per place. [2024-06-28 02:56:58,269 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 209 selfloop transitions, 86 changer transitions 0/298 dead transitions. [2024-06-28 02:56:58,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 298 transitions, 3793 flow [2024-06-28 02:56:58,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:56:58,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:56:58,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-28 02:56:58,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-28 02:56:58,273 INFO L175 Difference]: Start difference. First operand has 152 places, 231 transitions, 2578 flow. Second operand 9 states and 151 transitions. [2024-06-28 02:56:58,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 298 transitions, 3793 flow [2024-06-28 02:56:58,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 298 transitions, 3602 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-06-28 02:56:58,462 INFO L231 Difference]: Finished difference. Result has 160 places, 264 transitions, 3194 flow [2024-06-28 02:56:58,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2460, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3194, PETRI_PLACES=160, PETRI_TRANSITIONS=264} [2024-06-28 02:56:58,463 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-28 02:56:58,463 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 264 transitions, 3194 flow [2024-06-28 02:56:58,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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) [2024-06-28 02:56:58,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:56:58,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:56:58,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 02:56:58,464 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:56:58,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:56:58,464 INFO L85 PathProgramCache]: Analyzing trace with hash 112519651, now seen corresponding path program 1 times [2024-06-28 02:56:58,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:56:58,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000771341] [2024-06-28 02:56:58,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:56:58,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:56:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:00,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:00,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:00,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000771341] [2024-06-28 02:57:00,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000771341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:00,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:00,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:57:00,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019469731] [2024-06-28 02:57:00,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:00,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:57:00,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:00,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:57:00,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:57:00,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 02:57:00,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 264 transitions, 3194 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:00,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:00,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 02:57:00,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:00,977 INFO L124 PetriNetUnfolderBase]: 2973/4494 cut-off events. [2024-06-28 02:57:00,977 INFO L125 PetriNetUnfolderBase]: For 197166/197166 co-relation queries the response was YES. [2024-06-28 02:57:01,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33321 conditions, 4494 events. 2973/4494 cut-off events. For 197166/197166 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 22472 event pairs, 871 based on Foata normal form. 1/4492 useless extension candidates. Maximal degree in co-relation 33250. Up to 4364 conditions per place. [2024-06-28 02:57:01,022 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 262 selfloop transitions, 12 changer transitions 0/278 dead transitions. [2024-06-28 02:57:01,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 278 transitions, 3828 flow [2024-06-28 02:57:01,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:57:01,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:57:01,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-28 02:57:01,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-28 02:57:01,027 INFO L175 Difference]: Start difference. First operand has 160 places, 264 transitions, 3194 flow. Second operand 6 states and 98 transitions. [2024-06-28 02:57:01,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 278 transitions, 3828 flow [2024-06-28 02:57:01,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 278 transitions, 3592 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-28 02:57:01,236 INFO L231 Difference]: Finished difference. Result has 159 places, 267 transitions, 3040 flow [2024-06-28 02:57:01,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2958, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3040, PETRI_PLACES=159, PETRI_TRANSITIONS=267} [2024-06-28 02:57:01,237 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-28 02:57:01,237 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 267 transitions, 3040 flow [2024-06-28 02:57:01,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:01,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:01,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:01,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 02:57:01,238 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:01,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:01,238 INFO L85 PathProgramCache]: Analyzing trace with hash 112699141, now seen corresponding path program 2 times [2024-06-28 02:57:01,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:01,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407451033] [2024-06-28 02:57:01,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:01,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:01,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:02,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:02,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:02,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407451033] [2024-06-28 02:57:02,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407451033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:02,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:02,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:57:02,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629596056] [2024-06-28 02:57:02,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:02,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:57:02,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:02,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:57:02,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:57:02,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 02:57:02,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 267 transitions, 3040 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:02,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:02,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 02:57:02,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:03,617 INFO L124 PetriNetUnfolderBase]: 2970/4490 cut-off events. [2024-06-28 02:57:03,617 INFO L125 PetriNetUnfolderBase]: For 202175/202175 co-relation queries the response was YES. [2024-06-28 02:57:03,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33325 conditions, 4490 events. 2970/4490 cut-off events. For 202175/202175 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 22438 event pairs, 871 based on Foata normal form. 1/4488 useless extension candidates. Maximal degree in co-relation 33254. Up to 4366 conditions per place. [2024-06-28 02:57:03,661 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 262 selfloop transitions, 12 changer transitions 0/278 dead transitions. [2024-06-28 02:57:03,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 278 transitions, 3666 flow [2024-06-28 02:57:03,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:57:03,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:57:03,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-28 02:57:03,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376984126984127 [2024-06-28 02:57:03,662 INFO L175 Difference]: Start difference. First operand has 159 places, 267 transitions, 3040 flow. Second operand 6 states and 95 transitions. [2024-06-28 02:57:03,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 278 transitions, 3666 flow [2024-06-28 02:57:03,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 278 transitions, 3606 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-28 02:57:03,829 INFO L231 Difference]: Finished difference. Result has 161 places, 270 transitions, 3068 flow [2024-06-28 02:57:03,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2980, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3068, PETRI_PLACES=161, PETRI_TRANSITIONS=270} [2024-06-28 02:57:03,830 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-28 02:57:03,830 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 270 transitions, 3068 flow [2024-06-28 02:57:03,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:03,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:03,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:03,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 02:57:03,830 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:03,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:03,831 INFO L85 PathProgramCache]: Analyzing trace with hash 75780093, now seen corresponding path program 1 times [2024-06-28 02:57:03,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:03,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570597631] [2024-06-28 02:57:03,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:03,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:06,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:06,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:06,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570597631] [2024-06-28 02:57:06,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570597631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:06,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:06,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 02:57:06,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437947853] [2024-06-28 02:57:06,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:06,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 02:57:06,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:06,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 02:57:06,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-28 02:57:06,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:57:06,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 270 transitions, 3068 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:06,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:06,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:57:06,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:07,789 INFO L124 PetriNetUnfolderBase]: 3298/4874 cut-off events. [2024-06-28 02:57:07,789 INFO L125 PetriNetUnfolderBase]: For 256037/256041 co-relation queries the response was YES. [2024-06-28 02:57:07,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37739 conditions, 4874 events. 3298/4874 cut-off events. For 256037/256041 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 23755 event pairs, 717 based on Foata normal form. 12/4883 useless extension candidates. Maximal degree in co-relation 37667. Up to 4611 conditions per place. [2024-06-28 02:57:07,833 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 250 selfloop transitions, 53 changer transitions 0/306 dead transitions. [2024-06-28 02:57:07,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 306 transitions, 3874 flow [2024-06-28 02:57:07,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:57:07,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:57:07,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-28 02:57:07,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-28 02:57:07,837 INFO L175 Difference]: Start difference. First operand has 161 places, 270 transitions, 3068 flow. Second operand 9 states and 147 transitions. [2024-06-28 02:57:07,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 306 transitions, 3874 flow [2024-06-28 02:57:08,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 306 transitions, 3808 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-28 02:57:08,012 INFO L231 Difference]: Finished difference. Result has 166 places, 272 transitions, 3191 flow [2024-06-28 02:57:08,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3002, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3191, PETRI_PLACES=166, PETRI_TRANSITIONS=272} [2024-06-28 02:57:08,015 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-28 02:57:08,015 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 272 transitions, 3191 flow [2024-06-28 02:57:08,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:08,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:08,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:08,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 02:57:08,015 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:08,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:08,016 INFO L85 PathProgramCache]: Analyzing trace with hash 77654043, now seen corresponding path program 2 times [2024-06-28 02:57:08,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:08,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398719727] [2024-06-28 02:57:08,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:08,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:08,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:10,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:10,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398719727] [2024-06-28 02:57:10,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398719727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:10,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:10,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 02:57:10,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985584407] [2024-06-28 02:57:10,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:10,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 02:57:10,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:10,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 02:57:10,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-28 02:57:10,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:57:10,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 272 transitions, 3191 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:10,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:10,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:57:10,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:11,862 INFO L124 PetriNetUnfolderBase]: 3332/4931 cut-off events. [2024-06-28 02:57:11,862 INFO L125 PetriNetUnfolderBase]: For 270526/270530 co-relation queries the response was YES. [2024-06-28 02:57:11,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38833 conditions, 4931 events. 3332/4931 cut-off events. For 270526/270530 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 24140 event pairs, 803 based on Foata normal form. 12/4940 useless extension candidates. Maximal degree in co-relation 38760. Up to 4552 conditions per place. [2024-06-28 02:57:11,913 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 218 selfloop transitions, 87 changer transitions 0/308 dead transitions. [2024-06-28 02:57:11,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 308 transitions, 4007 flow [2024-06-28 02:57:11,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:57:11,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:57:11,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-28 02:57:11,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-28 02:57:11,914 INFO L175 Difference]: Start difference. First operand has 166 places, 272 transitions, 3191 flow. Second operand 9 states and 148 transitions. [2024-06-28 02:57:11,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 308 transitions, 4007 flow [2024-06-28 02:57:12,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 308 transitions, 3836 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-28 02:57:12,140 INFO L231 Difference]: Finished difference. Result has 168 places, 274 transitions, 3281 flow [2024-06-28 02:57:12,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3020, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3281, PETRI_PLACES=168, PETRI_TRANSITIONS=274} [2024-06-28 02:57:12,141 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-28 02:57:12,141 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 274 transitions, 3281 flow [2024-06-28 02:57:12,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:12,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:12,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:12,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 02:57:12,142 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:12,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:12,142 INFO L85 PathProgramCache]: Analyzing trace with hash 77657763, now seen corresponding path program 3 times [2024-06-28 02:57:12,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:12,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258686235] [2024-06-28 02:57:12,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:12,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:12,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:14,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:14,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258686235] [2024-06-28 02:57:14,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258686235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:14,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:14,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 02:57:14,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753556863] [2024-06-28 02:57:14,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:14,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 02:57:14,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:14,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 02:57:14,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-28 02:57:14,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:57:14,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 274 transitions, 3281 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:14,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:14,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:57:14,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:16,176 INFO L124 PetriNetUnfolderBase]: 3366/4976 cut-off events. [2024-06-28 02:57:16,176 INFO L125 PetriNetUnfolderBase]: For 289167/289171 co-relation queries the response was YES. [2024-06-28 02:57:16,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39662 conditions, 4976 events. 3366/4976 cut-off events. For 289167/289171 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 24323 event pairs, 785 based on Foata normal form. 12/4985 useless extension candidates. Maximal degree in co-relation 39588. Up to 4281 conditions per place. [2024-06-28 02:57:16,226 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 187 selfloop transitions, 121 changer transitions 0/311 dead transitions. [2024-06-28 02:57:16,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 311 transitions, 4117 flow [2024-06-28 02:57:16,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:57:16,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:57:16,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-28 02:57:16,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-28 02:57:16,228 INFO L175 Difference]: Start difference. First operand has 168 places, 274 transitions, 3281 flow. Second operand 9 states and 150 transitions. [2024-06-28 02:57:16,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 311 transitions, 4117 flow [2024-06-28 02:57:16,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 311 transitions, 3874 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-28 02:57:16,464 INFO L231 Difference]: Finished difference. Result has 170 places, 276 transitions, 3382 flow [2024-06-28 02:57:16,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3038, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3382, PETRI_PLACES=170, PETRI_TRANSITIONS=276} [2024-06-28 02:57:16,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-28 02:57:16,465 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 276 transitions, 3382 flow [2024-06-28 02:57:16,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:16,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:16,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:16,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 02:57:16,466 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:16,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:16,466 INFO L85 PathProgramCache]: Analyzing trace with hash 164499675, now seen corresponding path program 1 times [2024-06-28 02:57:16,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:16,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347744949] [2024-06-28 02:57:16,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:16,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:16,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:19,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:19,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:19,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347744949] [2024-06-28 02:57:19,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347744949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:19,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:19,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 02:57:19,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649269360] [2024-06-28 02:57:19,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:19,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 02:57:19,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:19,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 02:57:19,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-28 02:57:19,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:57:19,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 276 transitions, 3382 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:19,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:19,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:57:19,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:21,058 INFO L124 PetriNetUnfolderBase]: 3388/5009 cut-off events. [2024-06-28 02:57:21,058 INFO L125 PetriNetUnfolderBase]: For 299619/299623 co-relation queries the response was YES. [2024-06-28 02:57:21,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40335 conditions, 5009 events. 3388/5009 cut-off events. For 299619/299623 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 24561 event pairs, 789 based on Foata normal form. 8/5014 useless extension candidates. Maximal degree in co-relation 40260. Up to 4510 conditions per place. [2024-06-28 02:57:21,102 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 231 selfloop transitions, 94 changer transitions 0/328 dead transitions. [2024-06-28 02:57:21,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 328 transitions, 4440 flow [2024-06-28 02:57:21,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:57:21,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:57:21,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-28 02:57:21,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-28 02:57:21,108 INFO L175 Difference]: Start difference. First operand has 170 places, 276 transitions, 3382 flow. Second operand 9 states and 150 transitions. [2024-06-28 02:57:21,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 328 transitions, 4440 flow [2024-06-28 02:57:21,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 328 transitions, 4118 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-28 02:57:21,356 INFO L231 Difference]: Finished difference. Result has 173 places, 292 transitions, 3551 flow [2024-06-28 02:57:21,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3078, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3551, PETRI_PLACES=173, PETRI_TRANSITIONS=292} [2024-06-28 02:57:21,356 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-28 02:57:21,357 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 292 transitions, 3551 flow [2024-06-28 02:57:21,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:21,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:21,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:21,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 02:57:21,362 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:21,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:21,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1917516955, now seen corresponding path program 4 times [2024-06-28 02:57:21,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:21,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847989475] [2024-06-28 02:57:21,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:21,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:21,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:24,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:24,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:24,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847989475] [2024-06-28 02:57:24,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847989475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:24,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:24,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 02:57:24,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243765913] [2024-06-28 02:57:24,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:24,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 02:57:24,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:24,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 02:57:24,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 02:57:24,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:57:24,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 292 transitions, 3551 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:24,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:24,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:57:24,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:25,919 INFO L124 PetriNetUnfolderBase]: 3422/5064 cut-off events. [2024-06-28 02:57:25,919 INFO L125 PetriNetUnfolderBase]: For 316995/316995 co-relation queries the response was YES. [2024-06-28 02:57:25,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41213 conditions, 5064 events. 3422/5064 cut-off events. For 316995/316995 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 24901 event pairs, 835 based on Foata normal form. 8/5069 useless extension candidates. Maximal degree in co-relation 41136. Up to 4116 conditions per place. [2024-06-28 02:57:25,965 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 192 selfloop transitions, 137 changer transitions 0/332 dead transitions. [2024-06-28 02:57:25,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 332 transitions, 4615 flow [2024-06-28 02:57:25,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:57:25,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:57:25,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-28 02:57:25,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-28 02:57:25,969 INFO L175 Difference]: Start difference. First operand has 173 places, 292 transitions, 3551 flow. Second operand 9 states and 158 transitions. [2024-06-28 02:57:25,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 332 transitions, 4615 flow [2024-06-28 02:57:26,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 332 transitions, 4406 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-28 02:57:26,202 INFO L231 Difference]: Finished difference. Result has 176 places, 294 transitions, 3711 flow [2024-06-28 02:57:26,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3342, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3711, PETRI_PLACES=176, PETRI_TRANSITIONS=294} [2024-06-28 02:57:26,203 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-28 02:57:26,203 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 294 transitions, 3711 flow [2024-06-28 02:57:26,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:26,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:26,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:26,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 02:57:26,204 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:26,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:26,204 INFO L85 PathProgramCache]: Analyzing trace with hash -556441351, now seen corresponding path program 2 times [2024-06-28 02:57:26,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:26,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822173690] [2024-06-28 02:57:26,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:26,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:26,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:28,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:28,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822173690] [2024-06-28 02:57:28,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822173690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:28,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:28,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 02:57:28,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112161833] [2024-06-28 02:57:28,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:28,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 02:57:28,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:28,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 02:57:28,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 02:57:28,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:57:29,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 294 transitions, 3711 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:29,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:29,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:57:29,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:30,299 INFO L124 PetriNetUnfolderBase]: 3428/5073 cut-off events. [2024-06-28 02:57:30,300 INFO L125 PetriNetUnfolderBase]: For 328586/328586 co-relation queries the response was YES. [2024-06-28 02:57:30,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41757 conditions, 5073 events. 3428/5073 cut-off events. For 328586/328586 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 24973 event pairs, 807 based on Foata normal form. 4/5074 useless extension candidates. Maximal degree in co-relation 41679. Up to 4690 conditions per place. [2024-06-28 02:57:30,354 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 234 selfloop transitions, 100 changer transitions 0/337 dead transitions. [2024-06-28 02:57:30,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 337 transitions, 4640 flow [2024-06-28 02:57:30,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:57:30,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:57:30,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-28 02:57:30,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-28 02:57:30,356 INFO L175 Difference]: Start difference. First operand has 176 places, 294 transitions, 3711 flow. Second operand 10 states and 164 transitions. [2024-06-28 02:57:30,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 337 transitions, 4640 flow [2024-06-28 02:57:30,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 337 transitions, 4269 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-28 02:57:30,620 INFO L231 Difference]: Finished difference. Result has 180 places, 300 transitions, 3677 flow [2024-06-28 02:57:30,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3351, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3677, PETRI_PLACES=180, PETRI_TRANSITIONS=300} [2024-06-28 02:57:30,621 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-28 02:57:30,621 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 300 transitions, 3677 flow [2024-06-28 02:57:30,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:30,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:30,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:30,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 02:57:30,622 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:30,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:30,622 INFO L85 PathProgramCache]: Analyzing trace with hash 216051111, now seen corresponding path program 3 times [2024-06-28 02:57:30,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:30,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475351021] [2024-06-28 02:57:30,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:30,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:33,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:33,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475351021] [2024-06-28 02:57:33,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475351021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:33,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:33,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 02:57:33,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441525322] [2024-06-28 02:57:33,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:33,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 02:57:33,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:33,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 02:57:33,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 02:57:33,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:57:33,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 300 transitions, 3677 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:33,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:33,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:57:33,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:35,088 INFO L124 PetriNetUnfolderBase]: 3472/5137 cut-off events. [2024-06-28 02:57:35,089 INFO L125 PetriNetUnfolderBase]: For 337844/337848 co-relation queries the response was YES. [2024-06-28 02:57:35,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42147 conditions, 5137 events. 3472/5137 cut-off events. For 337844/337848 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 25392 event pairs, 915 based on Foata normal form. 8/5142 useless extension candidates. Maximal degree in co-relation 42067. Up to 4959 conditions per place. [2024-06-28 02:57:35,141 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 301 selfloop transitions, 40 changer transitions 0/344 dead transitions. [2024-06-28 02:57:35,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 344 transitions, 4599 flow [2024-06-28 02:57:35,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:57:35,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:57:35,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-28 02:57:35,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-28 02:57:35,163 INFO L175 Difference]: Start difference. First operand has 180 places, 300 transitions, 3677 flow. Second operand 10 states and 161 transitions. [2024-06-28 02:57:35,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 344 transitions, 4599 flow [2024-06-28 02:57:35,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 344 transitions, 4325 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-28 02:57:35,461 INFO L231 Difference]: Finished difference. Result has 184 places, 309 transitions, 3613 flow [2024-06-28 02:57:35,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3403, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3613, PETRI_PLACES=184, PETRI_TRANSITIONS=309} [2024-06-28 02:57:35,463 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-28 02:57:35,463 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 309 transitions, 3613 flow [2024-06-28 02:57:35,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:35,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:35,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:35,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 02:57:35,464 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:35,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:35,464 INFO L85 PathProgramCache]: Analyzing trace with hash -556595173, now seen corresponding path program 5 times [2024-06-28 02:57:35,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:35,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494820936] [2024-06-28 02:57:35,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:35,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:35,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:38,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:38,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:38,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494820936] [2024-06-28 02:57:38,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494820936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:38,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:38,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 02:57:38,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113893835] [2024-06-28 02:57:38,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:38,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 02:57:38,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:38,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 02:57:38,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 02:57:38,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:57:38,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 309 transitions, 3613 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:38,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:38,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:57:38,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:39,568 INFO L124 PetriNetUnfolderBase]: 3506/5191 cut-off events. [2024-06-28 02:57:39,569 INFO L125 PetriNetUnfolderBase]: For 357375/357375 co-relation queries the response was YES. [2024-06-28 02:57:39,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42895 conditions, 5191 events. 3506/5191 cut-off events. For 357375/357375 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 25702 event pairs, 788 based on Foata normal form. 8/5196 useless extension candidates. Maximal degree in co-relation 42813. Up to 4813 conditions per place. [2024-06-28 02:57:39,617 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 246 selfloop transitions, 95 changer transitions 0/344 dead transitions. [2024-06-28 02:57:39,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 344 transitions, 4517 flow [2024-06-28 02:57:39,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:57:39,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:57:39,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-28 02:57:39,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-28 02:57:39,621 INFO L175 Difference]: Start difference. First operand has 184 places, 309 transitions, 3613 flow. Second operand 9 states and 148 transitions. [2024-06-28 02:57:39,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 344 transitions, 4517 flow [2024-06-28 02:57:39,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 344 transitions, 4424 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-28 02:57:39,920 INFO L231 Difference]: Finished difference. Result has 188 places, 311 transitions, 3809 flow [2024-06-28 02:57:39,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3520, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3809, PETRI_PLACES=188, PETRI_TRANSITIONS=311} [2024-06-28 02:57:39,921 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-28 02:57:39,921 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 311 transitions, 3809 flow [2024-06-28 02:57:39,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:39,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:39,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:39,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 02:57:39,922 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:39,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:39,922 INFO L85 PathProgramCache]: Analyzing trace with hash 216252921, now seen corresponding path program 4 times [2024-06-28 02:57:39,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:39,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339677568] [2024-06-28 02:57:39,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:39,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:42,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:42,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:42,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339677568] [2024-06-28 02:57:42,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339677568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:42,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:42,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 02:57:42,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696477194] [2024-06-28 02:57:42,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:42,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 02:57:42,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:42,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 02:57:42,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 02:57:42,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:57:42,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 311 transitions, 3809 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:42,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:42,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:57:42,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:44,744 INFO L124 PetriNetUnfolderBase]: 3496/5177 cut-off events. [2024-06-28 02:57:44,744 INFO L125 PetriNetUnfolderBase]: For 366565/366569 co-relation queries the response was YES. [2024-06-28 02:57:44,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43297 conditions, 5177 events. 3496/5177 cut-off events. For 366565/366569 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 25634 event pairs, 909 based on Foata normal form. 8/5182 useless extension candidates. Maximal degree in co-relation 43213. Up to 4949 conditions per place. [2024-06-28 02:57:44,798 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 297 selfloop transitions, 49 changer transitions 0/349 dead transitions. [2024-06-28 02:57:44,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 349 transitions, 4659 flow [2024-06-28 02:57:44,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:57:44,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:57:44,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-28 02:57:44,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-28 02:57:44,800 INFO L175 Difference]: Start difference. First operand has 188 places, 311 transitions, 3809 flow. Second operand 10 states and 164 transitions. [2024-06-28 02:57:44,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 349 transitions, 4659 flow [2024-06-28 02:57:45,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 349 transitions, 4350 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-28 02:57:45,158 INFO L231 Difference]: Finished difference. Result has 191 places, 313 transitions, 3624 flow [2024-06-28 02:57:45,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3500, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3624, PETRI_PLACES=191, PETRI_TRANSITIONS=313} [2024-06-28 02:57:45,159 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-28 02:57:45,159 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 313 transitions, 3624 flow [2024-06-28 02:57:45,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:45,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:45,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:45,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 02:57:45,160 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:45,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:45,160 INFO L85 PathProgramCache]: Analyzing trace with hash -550869442, now seen corresponding path program 1 times [2024-06-28 02:57:45,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:45,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423157144] [2024-06-28 02:57:45,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:45,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:48,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:48,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:48,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423157144] [2024-06-28 02:57:48,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423157144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:48,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:48,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 02:57:48,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205437996] [2024-06-28 02:57:48,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:48,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 02:57:48,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:48,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 02:57:48,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 02:57:48,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:57:48,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 313 transitions, 3624 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:48,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:48,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:57:48,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:49,786 INFO L124 PetriNetUnfolderBase]: 3513/5204 cut-off events. [2024-06-28 02:57:49,786 INFO L125 PetriNetUnfolderBase]: For 376839/376843 co-relation queries the response was YES. [2024-06-28 02:57:49,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43255 conditions, 5204 events. 3513/5204 cut-off events. For 376839/376843 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 25853 event pairs, 920 based on Foata normal form. 8/5209 useless extension candidates. Maximal degree in co-relation 43170. Up to 5081 conditions per place. [2024-06-28 02:57:49,838 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 309 selfloop transitions, 36 changer transitions 0/348 dead transitions. [2024-06-28 02:57:49,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 348 transitions, 4514 flow [2024-06-28 02:57:49,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:57:49,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:57:49,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-28 02:57:49,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2024-06-28 02:57:49,840 INFO L175 Difference]: Start difference. First operand has 191 places, 313 transitions, 3624 flow. Second operand 10 states and 156 transitions. [2024-06-28 02:57:49,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 348 transitions, 4514 flow [2024-06-28 02:57:50,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 348 transitions, 4392 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-28 02:57:50,135 INFO L231 Difference]: Finished difference. Result has 193 places, 315 transitions, 3659 flow [2024-06-28 02:57:50,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3502, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3659, PETRI_PLACES=193, PETRI_TRANSITIONS=315} [2024-06-28 02:57:50,136 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-28 02:57:50,136 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 315 transitions, 3659 flow [2024-06-28 02:57:50,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:50,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:50,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:50,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 02:57:50,137 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:50,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:50,137 INFO L85 PathProgramCache]: Analyzing trace with hash -391019705, now seen corresponding path program 6 times [2024-06-28 02:57:50,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:50,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051866370] [2024-06-28 02:57:50,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:50,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:50,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:52,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:52,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:52,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051866370] [2024-06-28 02:57:52,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051866370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:52,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:52,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 02:57:52,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406619857] [2024-06-28 02:57:52,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:52,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 02:57:52,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:52,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 02:57:52,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 02:57:52,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:57:52,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 315 transitions, 3659 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:52,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:52,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:57:52,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:54,232 INFO L124 PetriNetUnfolderBase]: 3622/5383 cut-off events. [2024-06-28 02:57:54,232 INFO L125 PetriNetUnfolderBase]: For 427401/427405 co-relation queries the response was YES. [2024-06-28 02:57:54,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45167 conditions, 5383 events. 3622/5383 cut-off events. For 427401/427405 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 27081 event pairs, 936 based on Foata normal form. 32/5412 useless extension candidates. Maximal degree in co-relation 45081. Up to 4984 conditions per place. [2024-06-28 02:57:54,287 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 299 selfloop transitions, 51 changer transitions 0/353 dead transitions. [2024-06-28 02:57:54,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 353 transitions, 4615 flow [2024-06-28 02:57:54,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:57:54,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:57:54,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-28 02:57:54,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-28 02:57:54,289 INFO L175 Difference]: Start difference. First operand has 193 places, 315 transitions, 3659 flow. Second operand 9 states and 154 transitions. [2024-06-28 02:57:54,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 353 transitions, 4615 flow [2024-06-28 02:57:54,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 353 transitions, 4476 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-28 02:57:54,604 INFO L231 Difference]: Finished difference. Result has 194 places, 317 transitions, 3731 flow [2024-06-28 02:57:54,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3520, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3731, PETRI_PLACES=194, PETRI_TRANSITIONS=317} [2024-06-28 02:57:54,604 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-28 02:57:54,604 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 317 transitions, 3731 flow [2024-06-28 02:57:54,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:54,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:54,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:54,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 02:57:54,605 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:54,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:54,605 INFO L85 PathProgramCache]: Analyzing trace with hash 141652833, now seen corresponding path program 1 times [2024-06-28 02:57:54,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:54,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355364856] [2024-06-28 02:57:54,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:54,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:56,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:56,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:56,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355364856] [2024-06-28 02:57:56,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355364856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:56,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:56,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:57:56,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328741441] [2024-06-28 02:57:56,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:56,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:57:56,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:56,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:57:56,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:57:56,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:57:56,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 317 transitions, 3731 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:56,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:56,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:57:56,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:57:57,446 INFO L124 PetriNetUnfolderBase]: 3632/5401 cut-off events. [2024-06-28 02:57:57,446 INFO L125 PetriNetUnfolderBase]: For 419904/419908 co-relation queries the response was YES. [2024-06-28 02:57:57,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45708 conditions, 5401 events. 3632/5401 cut-off events. For 419904/419908 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 27260 event pairs, 944 based on Foata normal form. 6/5404 useless extension candidates. Maximal degree in co-relation 45621. Up to 5230 conditions per place. [2024-06-28 02:57:57,494 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 287 selfloop transitions, 50 changer transitions 0/340 dead transitions. [2024-06-28 02:57:57,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 340 transitions, 4523 flow [2024-06-28 02:57:57,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:57:57,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:57:57,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-28 02:57:57,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-28 02:57:57,496 INFO L175 Difference]: Start difference. First operand has 194 places, 317 transitions, 3731 flow. Second operand 7 states and 115 transitions. [2024-06-28 02:57:57,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 340 transitions, 4523 flow [2024-06-28 02:57:57,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 340 transitions, 4360 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-28 02:57:57,840 INFO L231 Difference]: Finished difference. Result has 194 places, 320 transitions, 3737 flow [2024-06-28 02:57:57,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3568, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3737, PETRI_PLACES=194, PETRI_TRANSITIONS=320} [2024-06-28 02:57:57,841 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-28 02:57:57,841 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 320 transitions, 3737 flow [2024-06-28 02:57:57,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:57,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:57:57,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:57:57,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 02:57:57,842 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:57:57,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:57:57,842 INFO L85 PathProgramCache]: Analyzing trace with hash 141981526, now seen corresponding path program 1 times [2024-06-28 02:57:57,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:57:57,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087710968] [2024-06-28 02:57:57,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:57:57,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:57:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:57:59,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:57:59,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:57:59,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087710968] [2024-06-28 02:57:59,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087710968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:57:59,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:57:59,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:57:59,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426091497] [2024-06-28 02:57:59,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:57:59,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:57:59,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:57:59,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:57:59,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:57:59,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:57:59,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 320 transitions, 3737 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:57:59,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:57:59,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:57:59,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:00,864 INFO L124 PetriNetUnfolderBase]: 3637/5404 cut-off events. [2024-06-28 02:58:00,864 INFO L125 PetriNetUnfolderBase]: For 421428/421432 co-relation queries the response was YES. [2024-06-28 02:58:00,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45653 conditions, 5404 events. 3637/5404 cut-off events. For 421428/421432 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 27202 event pairs, 959 based on Foata normal form. 5/5406 useless extension candidates. Maximal degree in co-relation 45565. Up to 5347 conditions per place. [2024-06-28 02:58:00,920 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 312 selfloop transitions, 22 changer transitions 0/337 dead transitions. [2024-06-28 02:58:00,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 337 transitions, 4495 flow [2024-06-28 02:58:00,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:58:00,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:58:00,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-28 02:58:00,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36394557823129253 [2024-06-28 02:58:00,923 INFO L175 Difference]: Start difference. First operand has 194 places, 320 transitions, 3737 flow. Second operand 7 states and 107 transitions. [2024-06-28 02:58:00,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 337 transitions, 4495 flow [2024-06-28 02:58:01,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 337 transitions, 4370 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-28 02:58:01,250 INFO L231 Difference]: Finished difference. Result has 196 places, 323 transitions, 3710 flow [2024-06-28 02:58:01,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3612, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3710, PETRI_PLACES=196, PETRI_TRANSITIONS=323} [2024-06-28 02:58:01,251 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-28 02:58:01,251 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 323 transitions, 3710 flow [2024-06-28 02:58:01,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:01,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:01,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:01,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 02:58:01,252 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:01,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:01,252 INFO L85 PathProgramCache]: Analyzing trace with hash 141981123, now seen corresponding path program 2 times [2024-06-28 02:58:01,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:01,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200327232] [2024-06-28 02:58:01,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:01,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:02,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:02,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:02,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200327232] [2024-06-28 02:58:02,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200327232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:02,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:02,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:58:02,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543637061] [2024-06-28 02:58:02,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:02,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:58:02,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:02,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:58:02,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:58:02,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:58:02,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 323 transitions, 3710 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:02,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:02,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:58:02,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:04,012 INFO L124 PetriNetUnfolderBase]: 3662/5439 cut-off events. [2024-06-28 02:58:04,012 INFO L125 PetriNetUnfolderBase]: For 435183/435183 co-relation queries the response was YES. [2024-06-28 02:58:04,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46319 conditions, 5439 events. 3662/5439 cut-off events. For 435183/435183 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 27360 event pairs, 896 based on Foata normal form. 2/5428 useless extension candidates. Maximal degree in co-relation 46230. Up to 5273 conditions per place. [2024-06-28 02:58:04,067 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 291 selfloop transitions, 54 changer transitions 0/348 dead transitions. [2024-06-28 02:58:04,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 348 transitions, 4541 flow [2024-06-28 02:58:04,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:58:04,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:58:04,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-28 02:58:04,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-28 02:58:04,073 INFO L175 Difference]: Start difference. First operand has 196 places, 323 transitions, 3710 flow. Second operand 8 states and 124 transitions. [2024-06-28 02:58:04,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 348 transitions, 4541 flow [2024-06-28 02:58:04,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 348 transitions, 4460 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-28 02:58:04,374 INFO L231 Difference]: Finished difference. Result has 200 places, 332 transitions, 3860 flow [2024-06-28 02:58:04,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3634, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3860, PETRI_PLACES=200, PETRI_TRANSITIONS=332} [2024-06-28 02:58:04,375 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-28 02:58:04,375 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 332 transitions, 3860 flow [2024-06-28 02:58:04,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:04,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:04,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:04,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 02:58:04,376 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:04,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:04,376 INFO L85 PathProgramCache]: Analyzing trace with hash -2135527835, now seen corresponding path program 7 times [2024-06-28 02:58:04,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:04,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65452536] [2024-06-28 02:58:04,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:04,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:06,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:06,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65452536] [2024-06-28 02:58:06,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65452536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:06,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:06,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 02:58:06,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246285530] [2024-06-28 02:58:06,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:06,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 02:58:06,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:06,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 02:58:06,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 02:58:06,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:58:06,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 332 transitions, 3860 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:06,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:06,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:58:06,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:08,296 INFO L124 PetriNetUnfolderBase]: 3771/5620 cut-off events. [2024-06-28 02:58:08,297 INFO L125 PetriNetUnfolderBase]: For 493864/493876 co-relation queries the response was YES. [2024-06-28 02:58:08,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48666 conditions, 5620 events. 3771/5620 cut-off events. For 493864/493876 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 28693 event pairs, 967 based on Foata normal form. 36/5648 useless extension candidates. Maximal degree in co-relation 48575. Up to 5244 conditions per place. [2024-06-28 02:58:08,354 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 323 selfloop transitions, 45 changer transitions 0/371 dead transitions. [2024-06-28 02:58:08,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 371 transitions, 5062 flow [2024-06-28 02:58:08,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:58:08,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:58:08,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-28 02:58:08,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-28 02:58:08,355 INFO L175 Difference]: Start difference. First operand has 200 places, 332 transitions, 3860 flow. Second operand 9 states and 155 transitions. [2024-06-28 02:58:08,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 371 transitions, 5062 flow [2024-06-28 02:58:08,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 371 transitions, 4924 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-28 02:58:08,803 INFO L231 Difference]: Finished difference. Result has 204 places, 334 transitions, 3922 flow [2024-06-28 02:58:08,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3722, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3922, PETRI_PLACES=204, PETRI_TRANSITIONS=334} [2024-06-28 02:58:08,804 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-28 02:58:08,804 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 334 transitions, 3922 flow [2024-06-28 02:58:08,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:08,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:08,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:08,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 02:58:08,805 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:08,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:08,805 INFO L85 PathProgramCache]: Analyzing trace with hash -2140773435, now seen corresponding path program 5 times [2024-06-28 02:58:08,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:08,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886051326] [2024-06-28 02:58:08,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:08,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:11,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:11,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:11,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886051326] [2024-06-28 02:58:11,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886051326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:11,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:11,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 02:58:11,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86135887] [2024-06-28 02:58:11,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:11,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 02:58:11,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:11,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 02:58:11,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 02:58:11,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:58:11,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 334 transitions, 3922 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:11,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:11,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:58:11,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:13,752 INFO L124 PetriNetUnfolderBase]: 3815/5684 cut-off events. [2024-06-28 02:58:13,753 INFO L125 PetriNetUnfolderBase]: For 484538/484550 co-relation queries the response was YES. [2024-06-28 02:58:13,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49599 conditions, 5684 events. 3815/5684 cut-off events. For 484538/484550 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 29076 event pairs, 958 based on Foata normal form. 12/5688 useless extension candidates. Maximal degree in co-relation 49507. Up to 5438 conditions per place. [2024-06-28 02:58:13,815 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 324 selfloop transitions, 50 changer transitions 0/377 dead transitions. [2024-06-28 02:58:13,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 377 transitions, 5112 flow [2024-06-28 02:58:13,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:58:13,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:58:13,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-28 02:58:13,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-28 02:58:13,817 INFO L175 Difference]: Start difference. First operand has 204 places, 334 transitions, 3922 flow. Second operand 10 states and 166 transitions. [2024-06-28 02:58:13,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 377 transitions, 5112 flow [2024-06-28 02:58:14,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 377 transitions, 4959 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-28 02:58:14,226 INFO L231 Difference]: Finished difference. Result has 209 places, 341 transitions, 3997 flow [2024-06-28 02:58:14,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3776, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3997, PETRI_PLACES=209, PETRI_TRANSITIONS=341} [2024-06-28 02:58:14,227 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-28 02:58:14,227 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 341 transitions, 3997 flow [2024-06-28 02:58:14,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:14,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:14,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:14,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 02:58:14,227 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:14,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:14,228 INFO L85 PathProgramCache]: Analyzing trace with hash 891148791, now seen corresponding path program 6 times [2024-06-28 02:58:14,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:14,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949614354] [2024-06-28 02:58:14,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:14,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:14,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:17,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:17,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949614354] [2024-06-28 02:58:17,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949614354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:17,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:17,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 02:58:17,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567088677] [2024-06-28 02:58:17,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:17,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 02:58:17,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:17,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 02:58:17,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 02:58:17,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:58:17,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 341 transitions, 3997 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:17,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:17,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:58:17,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:19,777 INFO L124 PetriNetUnfolderBase]: 3903/5812 cut-off events. [2024-06-28 02:58:19,778 INFO L125 PetriNetUnfolderBase]: For 478787/478799 co-relation queries the response was YES. [2024-06-28 02:58:19,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50298 conditions, 5812 events. 3903/5812 cut-off events. For 478787/478799 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 29839 event pairs, 839 based on Foata normal form. 12/5816 useless extension candidates. Maximal degree in co-relation 50204. Up to 5179 conditions per place. [2024-06-28 02:58:19,843 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 294 selfloop transitions, 99 changer transitions 0/396 dead transitions. [2024-06-28 02:58:19,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 396 transitions, 5396 flow [2024-06-28 02:58:19,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 02:58:19,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 02:58:19,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-28 02:58:19,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38311688311688313 [2024-06-28 02:58:19,845 INFO L175 Difference]: Start difference. First operand has 209 places, 341 transitions, 3997 flow. Second operand 11 states and 177 transitions. [2024-06-28 02:58:19,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 396 transitions, 5396 flow [2024-06-28 02:58:20,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 396 transitions, 5222 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-28 02:58:20,204 INFO L231 Difference]: Finished difference. Result has 215 places, 357 transitions, 4251 flow [2024-06-28 02:58:20,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3827, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4251, PETRI_PLACES=215, PETRI_TRANSITIONS=357} [2024-06-28 02:58:20,205 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-28 02:58:20,205 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 357 transitions, 4251 flow [2024-06-28 02:58:20,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:20,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:20,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:20,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 02:58:20,211 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:20,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:20,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1257195748, now seen corresponding path program 2 times [2024-06-28 02:58:20,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:20,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063525621] [2024-06-28 02:58:20,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:20,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:20,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:23,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:23,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:23,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063525621] [2024-06-28 02:58:23,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063525621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:23,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:23,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 02:58:23,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550812240] [2024-06-28 02:58:23,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:23,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 02:58:23,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:23,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 02:58:23,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-28 02:58:23,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:58:23,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 357 transitions, 4251 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:23,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:23,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:58:23,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:25,236 INFO L124 PetriNetUnfolderBase]: 3931/5855 cut-off events. [2024-06-28 02:58:25,237 INFO L125 PetriNetUnfolderBase]: For 498190/498202 co-relation queries the response was YES. [2024-06-28 02:58:25,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51490 conditions, 5855 events. 3931/5855 cut-off events. For 498190/498202 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 30107 event pairs, 895 based on Foata normal form. 12/5859 useless extension candidates. Maximal degree in co-relation 51392. Up to 5649 conditions per place. [2024-06-28 02:58:25,424 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 339 selfloop transitions, 59 changer transitions 0/401 dead transitions. [2024-06-28 02:58:25,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 401 transitions, 5463 flow [2024-06-28 02:58:25,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:58:25,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:58:25,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-28 02:58:25,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3738095238095238 [2024-06-28 02:58:25,440 INFO L175 Difference]: Start difference. First operand has 215 places, 357 transitions, 4251 flow. Second operand 10 states and 157 transitions. [2024-06-28 02:58:25,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 401 transitions, 5463 flow [2024-06-28 02:58:25,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 401 transitions, 5287 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-28 02:58:25,849 INFO L231 Difference]: Finished difference. Result has 223 places, 370 transitions, 4550 flow [2024-06-28 02:58:25,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4083, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4550, PETRI_PLACES=223, PETRI_TRANSITIONS=370} [2024-06-28 02:58:25,849 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-28 02:58:25,849 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 370 transitions, 4550 flow [2024-06-28 02:58:25,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:25,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:25,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:25,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 02:58:25,850 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:25,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:25,851 INFO L85 PathProgramCache]: Analyzing trace with hash -2146285917, now seen corresponding path program 8 times [2024-06-28 02:58:25,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:25,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989740335] [2024-06-28 02:58:25,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:25,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:25,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:28,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:28,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:28,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989740335] [2024-06-28 02:58:28,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989740335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:28,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:28,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 02:58:28,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724749987] [2024-06-28 02:58:28,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:28,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 02:58:28,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:28,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 02:58:28,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 02:58:28,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:58:28,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 370 transitions, 4550 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:28,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:28,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:58:28,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:30,042 INFO L124 PetriNetUnfolderBase]: 3965/5911 cut-off events. [2024-06-28 02:58:30,042 INFO L125 PetriNetUnfolderBase]: For 524068/524074 co-relation queries the response was YES. [2024-06-28 02:58:30,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51857 conditions, 5911 events. 3965/5911 cut-off events. For 524068/524074 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 30461 event pairs, 765 based on Foata normal form. 12/5903 useless extension candidates. Maximal degree in co-relation 51755. Up to 5465 conditions per place. [2024-06-28 02:58:30,121 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 301 selfloop transitions, 100 changer transitions 0/404 dead transitions. [2024-06-28 02:58:30,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 404 transitions, 5598 flow [2024-06-28 02:58:30,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:58:30,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:58:30,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-28 02:58:30,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-28 02:58:30,123 INFO L175 Difference]: Start difference. First operand has 223 places, 370 transitions, 4550 flow. Second operand 9 states and 149 transitions. [2024-06-28 02:58:30,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 404 transitions, 5598 flow [2024-06-28 02:58:30,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 404 transitions, 5389 flow, removed 88 selfloop flow, removed 3 redundant places. [2024-06-28 02:58:30,750 INFO L231 Difference]: Finished difference. Result has 229 places, 372 transitions, 4658 flow [2024-06-28 02:58:30,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4343, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4658, PETRI_PLACES=229, PETRI_TRANSITIONS=372} [2024-06-28 02:58:30,751 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-28 02:58:30,751 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 372 transitions, 4658 flow [2024-06-28 02:58:30,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:30,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:30,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:30,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 02:58:30,752 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:30,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:30,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1056106498, now seen corresponding path program 3 times [2024-06-28 02:58:30,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:30,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621836038] [2024-06-28 02:58:30,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:30,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:33,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:33,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:33,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621836038] [2024-06-28 02:58:33,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621836038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:33,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:33,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 02:58:33,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691266238] [2024-06-28 02:58:33,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:33,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 02:58:33,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:33,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 02:58:33,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 02:58:33,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:58:33,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 372 transitions, 4658 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:33,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:33,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:58:33,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:35,214 INFO L124 PetriNetUnfolderBase]: 3982/5936 cut-off events. [2024-06-28 02:58:35,214 INFO L125 PetriNetUnfolderBase]: For 534744/534756 co-relation queries the response was YES. [2024-06-28 02:58:35,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52440 conditions, 5936 events. 3982/5936 cut-off events. For 534744/534756 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 30659 event pairs, 896 based on Foata normal form. 12/5940 useless extension candidates. Maximal degree in co-relation 52336. Up to 5801 conditions per place. [2024-06-28 02:58:35,281 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 359 selfloop transitions, 39 changer transitions 0/401 dead transitions. [2024-06-28 02:58:35,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 401 transitions, 5648 flow [2024-06-28 02:58:35,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:58:35,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:58:35,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-28 02:58:35,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-28 02:58:35,283 INFO L175 Difference]: Start difference. First operand has 229 places, 372 transitions, 4658 flow. Second operand 9 states and 142 transitions. [2024-06-28 02:58:35,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 401 transitions, 5648 flow [2024-06-28 02:58:35,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 401 transitions, 5347 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-28 02:58:35,779 INFO L231 Difference]: Finished difference. Result has 231 places, 374 transitions, 4536 flow [2024-06-28 02:58:35,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4357, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4536, PETRI_PLACES=231, PETRI_TRANSITIONS=374} [2024-06-28 02:58:35,779 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-28 02:58:35,780 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 374 transitions, 4536 flow [2024-06-28 02:58:35,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:35,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:35,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:35,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 02:58:35,780 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:35,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:35,783 INFO L85 PathProgramCache]: Analyzing trace with hash 895101728, now seen corresponding path program 4 times [2024-06-28 02:58:35,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:35,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007610633] [2024-06-28 02:58:35,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:35,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:39,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:39,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:39,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007610633] [2024-06-28 02:58:39,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007610633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:39,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:39,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 02:58:39,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577208733] [2024-06-28 02:58:39,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:39,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 02:58:39,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:39,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 02:58:39,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-28 02:58:39,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:58:39,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 374 transitions, 4536 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:39,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:39,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:58:39,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:41,073 INFO L124 PetriNetUnfolderBase]: 3999/5963 cut-off events. [2024-06-28 02:58:41,073 INFO L125 PetriNetUnfolderBase]: For 548939/548951 co-relation queries the response was YES. [2024-06-28 02:58:41,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52547 conditions, 5963 events. 3999/5963 cut-off events. For 548939/548951 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 30835 event pairs, 915 based on Foata normal form. 12/5967 useless extension candidates. Maximal degree in co-relation 52442. Up to 5712 conditions per place. [2024-06-28 02:58:41,137 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 331 selfloop transitions, 73 changer transitions 0/407 dead transitions. [2024-06-28 02:58:41,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 407 transitions, 5558 flow [2024-06-28 02:58:41,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:58:41,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:58:41,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-28 02:58:41,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761904761904762 [2024-06-28 02:58:41,139 INFO L175 Difference]: Start difference. First operand has 231 places, 374 transitions, 4536 flow. Second operand 10 states and 158 transitions. [2024-06-28 02:58:41,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 407 transitions, 5558 flow [2024-06-28 02:58:41,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 407 transitions, 5397 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-28 02:58:41,727 INFO L231 Difference]: Finished difference. Result has 234 places, 376 transitions, 4626 flow [2024-06-28 02:58:41,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4375, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4626, PETRI_PLACES=234, PETRI_TRANSITIONS=376} [2024-06-28 02:58:41,728 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-28 02:58:41,728 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 376 transitions, 4626 flow [2024-06-28 02:58:41,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:41,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:41,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:41,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 02:58:41,729 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:41,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:41,729 INFO L85 PathProgramCache]: Analyzing trace with hash -2140571625, now seen corresponding path program 7 times [2024-06-28 02:58:41,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:41,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412886154] [2024-06-28 02:58:41,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:41,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:41,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:44,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:44,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:44,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412886154] [2024-06-28 02:58:44,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412886154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:44,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:44,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 02:58:44,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130162285] [2024-06-28 02:58:44,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:44,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 02:58:44,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:44,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 02:58:44,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 02:58:44,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:58:44,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 376 transitions, 4626 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:44,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:44,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:58:44,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:46,669 INFO L124 PetriNetUnfolderBase]: 3989/5949 cut-off events. [2024-06-28 02:58:46,669 INFO L125 PetriNetUnfolderBase]: For 559181/559193 co-relation queries the response was YES. [2024-06-28 02:58:46,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52628 conditions, 5949 events. 3989/5949 cut-off events. For 559181/559193 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 30809 event pairs, 888 based on Foata normal form. 12/5953 useless extension candidates. Maximal degree in co-relation 52522. Up to 5709 conditions per place. [2024-06-28 02:58:46,740 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 356 selfloop transitions, 51 changer transitions 0/410 dead transitions. [2024-06-28 02:58:46,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 410 transitions, 5574 flow [2024-06-28 02:58:46,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:58:46,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:58:46,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-28 02:58:46,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880952380952381 [2024-06-28 02:58:46,742 INFO L175 Difference]: Start difference. First operand has 234 places, 376 transitions, 4626 flow. Second operand 10 states and 163 transitions. [2024-06-28 02:58:46,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 410 transitions, 5574 flow [2024-06-28 02:58:47,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 410 transitions, 5279 flow, removed 73 selfloop flow, removed 9 redundant places. [2024-06-28 02:58:47,491 INFO L231 Difference]: Finished difference. Result has 235 places, 376 transitions, 4441 flow [2024-06-28 02:58:47,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4331, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4441, PETRI_PLACES=235, PETRI_TRANSITIONS=376} [2024-06-28 02:58:47,491 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-28 02:58:47,492 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 376 transitions, 4441 flow [2024-06-28 02:58:47,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:47,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:47,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:47,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 02:58:47,492 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:47,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:47,493 INFO L85 PathProgramCache]: Analyzing trace with hash -2141038085, now seen corresponding path program 9 times [2024-06-28 02:58:47,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:47,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57354484] [2024-06-28 02:58:47,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:47,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:47,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:50,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:50,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:50,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57354484] [2024-06-28 02:58:50,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57354484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:50,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:50,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 02:58:50,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213212946] [2024-06-28 02:58:50,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:50,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 02:58:50,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:50,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 02:58:50,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 02:58:50,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:58:50,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 376 transitions, 4441 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:50,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:50,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:58:50,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:51,964 INFO L124 PetriNetUnfolderBase]: 4023/6005 cut-off events. [2024-06-28 02:58:51,965 INFO L125 PetriNetUnfolderBase]: For 585288/585294 co-relation queries the response was YES. [2024-06-28 02:58:52,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53131 conditions, 6005 events. 4023/6005 cut-off events. For 585288/585294 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 31107 event pairs, 764 based on Foata normal form. 12/5997 useless extension candidates. Maximal degree in co-relation 53026. Up to 5587 conditions per place. [2024-06-28 02:58:52,256 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 307 selfloop transitions, 99 changer transitions 0/409 dead transitions. [2024-06-28 02:58:52,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 409 transitions, 5491 flow [2024-06-28 02:58:52,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:58:52,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:58:52,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-28 02:58:52,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-28 02:58:52,258 INFO L175 Difference]: Start difference. First operand has 235 places, 376 transitions, 4441 flow. Second operand 9 states and 147 transitions. [2024-06-28 02:58:52,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 409 transitions, 5491 flow [2024-06-28 02:58:52,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 409 transitions, 5389 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 02:58:52,782 INFO L231 Difference]: Finished difference. Result has 237 places, 378 transitions, 4660 flow [2024-06-28 02:58:52,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4339, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4660, PETRI_PLACES=237, PETRI_TRANSITIONS=378} [2024-06-28 02:58:52,783 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-28 02:58:52,783 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 378 transitions, 4660 flow [2024-06-28 02:58:52,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:52,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:52,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:52,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 02:58:52,783 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:52,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:52,785 INFO L85 PathProgramCache]: Analyzing trace with hash 629188967, now seen corresponding path program 10 times [2024-06-28 02:58:52,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:52,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120830857] [2024-06-28 02:58:52,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:52,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:52,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:58:55,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:58:55,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:58:55,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120830857] [2024-06-28 02:58:55,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120830857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:58:55,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:58:55,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 02:58:55,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215303056] [2024-06-28 02:58:55,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:58:55,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 02:58:55,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:58:55,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 02:58:55,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 02:58:55,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:58:55,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 378 transitions, 4660 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:55,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:58:55,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:58:55,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:58:57,348 INFO L124 PetriNetUnfolderBase]: 4082/6104 cut-off events. [2024-06-28 02:58:57,349 INFO L125 PetriNetUnfolderBase]: For 638079/638091 co-relation queries the response was YES. [2024-06-28 02:58:57,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54155 conditions, 6104 events. 4082/6104 cut-off events. For 638079/638091 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 31885 event pairs, 893 based on Foata normal form. 36/6132 useless extension candidates. Maximal degree in co-relation 54049. Up to 5282 conditions per place. [2024-06-28 02:58:57,421 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 310 selfloop transitions, 104 changer transitions 0/417 dead transitions. [2024-06-28 02:58:57,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 417 transitions, 5996 flow [2024-06-28 02:58:57,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:58:57,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:58:57,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-28 02:58:57,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-28 02:58:57,423 INFO L175 Difference]: Start difference. First operand has 237 places, 378 transitions, 4660 flow. Second operand 9 states and 160 transitions. [2024-06-28 02:58:57,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 417 transitions, 5996 flow [2024-06-28 02:58:57,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 417 transitions, 5693 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-28 02:58:57,974 INFO L231 Difference]: Finished difference. Result has 239 places, 380 transitions, 4696 flow [2024-06-28 02:58:57,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4357, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4696, PETRI_PLACES=239, PETRI_TRANSITIONS=380} [2024-06-28 02:58:57,975 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-28 02:58:57,975 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 380 transitions, 4696 flow [2024-06-28 02:58:57,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:58:57,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:58:57,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:58:57,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 02:58:57,976 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:58:57,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:58:57,976 INFO L85 PathProgramCache]: Analyzing trace with hash 629194919, now seen corresponding path program 8 times [2024-06-28 02:58:57,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:58:57,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818177126] [2024-06-28 02:58:57,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:58:57,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:58:57,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:00,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:00,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818177126] [2024-06-28 02:59:00,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818177126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:00,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:00,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 02:59:00,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61974635] [2024-06-28 02:59:00,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:00,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 02:59:00,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:00,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 02:59:00,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 02:59:00,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:59:00,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 380 transitions, 4696 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:00,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:00,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:59:00,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:02,639 INFO L124 PetriNetUnfolderBase]: 4126/6168 cut-off events. [2024-06-28 02:59:02,639 INFO L125 PetriNetUnfolderBase]: For 612791/612803 co-relation queries the response was YES. [2024-06-28 02:59:02,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54721 conditions, 6168 events. 4126/6168 cut-off events. For 612791/612803 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 32367 event pairs, 888 based on Foata normal form. 12/6172 useless extension candidates. Maximal degree in co-relation 54614. Up to 5496 conditions per place. [2024-06-28 02:59:02,713 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 311 selfloop transitions, 109 changer transitions 0/423 dead transitions. [2024-06-28 02:59:02,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 423 transitions, 6011 flow [2024-06-28 02:59:02,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:59:02,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:59:02,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-28 02:59:02,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-28 02:59:02,715 INFO L175 Difference]: Start difference. First operand has 239 places, 380 transitions, 4696 flow. Second operand 10 states and 171 transitions. [2024-06-28 02:59:02,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 423 transitions, 6011 flow [2024-06-28 02:59:03,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 423 transitions, 5709 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-28 02:59:03,475 INFO L231 Difference]: Finished difference. Result has 242 places, 386 transitions, 4723 flow [2024-06-28 02:59:03,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4405, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4723, PETRI_PLACES=242, PETRI_TRANSITIONS=386} [2024-06-28 02:59:03,477 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-28 02:59:03,477 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 386 transitions, 4723 flow [2024-06-28 02:59:03,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:03,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:03,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:03,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 02:59:03,477 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:03,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:03,478 INFO L85 PathProgramCache]: Analyzing trace with hash 629396729, now seen corresponding path program 9 times [2024-06-28 02:59:03,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:03,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077656802] [2024-06-28 02:59:03,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:03,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:06,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:06,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:06,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077656802] [2024-06-28 02:59:06,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077656802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:06,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:06,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 02:59:06,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898528154] [2024-06-28 02:59:06,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:06,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 02:59:06,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:06,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 02:59:06,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 02:59:06,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:59:06,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 386 transitions, 4723 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:06,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:06,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:59:06,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:08,310 INFO L124 PetriNetUnfolderBase]: 4116/6154 cut-off events. [2024-06-28 02:59:08,310 INFO L125 PetriNetUnfolderBase]: For 604720/604732 co-relation queries the response was YES. [2024-06-28 02:59:08,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53789 conditions, 6154 events. 4116/6154 cut-off events. For 604720/604732 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 32259 event pairs, 893 based on Foata normal form. 12/6158 useless extension candidates. Maximal degree in co-relation 53681. Up to 5488 conditions per place. [2024-06-28 02:59:08,373 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 314 selfloop transitions, 104 changer transitions 0/421 dead transitions. [2024-06-28 02:59:08,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 421 transitions, 5697 flow [2024-06-28 02:59:08,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:59:08,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:59:08,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-28 02:59:08,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 02:59:08,374 INFO L175 Difference]: Start difference. First operand has 242 places, 386 transitions, 4723 flow. Second operand 10 states and 170 transitions. [2024-06-28 02:59:08,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 421 transitions, 5697 flow [2024-06-28 02:59:09,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 421 transitions, 5375 flow, removed 45 selfloop flow, removed 8 redundant places. [2024-06-28 02:59:09,036 INFO L231 Difference]: Finished difference. Result has 244 places, 386 transitions, 4617 flow [2024-06-28 02:59:09,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4401, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4617, PETRI_PLACES=244, PETRI_TRANSITIONS=386} [2024-06-28 02:59:09,037 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-28 02:59:09,037 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 386 transitions, 4617 flow [2024-06-28 02:59:09,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:09,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:09,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:09,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 02:59:09,037 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:09,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:09,038 INFO L85 PathProgramCache]: Analyzing trace with hash 629404448, now seen corresponding path program 5 times [2024-06-28 02:59:09,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:09,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191463793] [2024-06-28 02:59:09,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:09,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:11,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:11,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:11,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191463793] [2024-06-28 02:59:11,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191463793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:11,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:11,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:59:11,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15826048] [2024-06-28 02:59:11,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:11,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:59:11,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:11,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:59:11,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:59:11,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:59:11,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 386 transitions, 4617 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:11,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:11,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:59:11,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:13,404 INFO L124 PetriNetUnfolderBase]: 4133/6181 cut-off events. [2024-06-28 02:59:13,404 INFO L125 PetriNetUnfolderBase]: For 623527/623539 co-relation queries the response was YES. [2024-06-28 02:59:13,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54122 conditions, 6181 events. 4133/6181 cut-off events. For 623527/623539 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 32362 event pairs, 928 based on Foata normal form. 12/6185 useless extension candidates. Maximal degree in co-relation 54014. Up to 5930 conditions per place. [2024-06-28 02:59:13,476 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 345 selfloop transitions, 67 changer transitions 0/415 dead transitions. [2024-06-28 02:59:13,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 415 transitions, 5647 flow [2024-06-28 02:59:13,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:59:13,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:59:13,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-28 02:59:13,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-28 02:59:13,478 INFO L175 Difference]: Start difference. First operand has 244 places, 386 transitions, 4617 flow. Second operand 9 states and 147 transitions. [2024-06-28 02:59:13,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 415 transitions, 5647 flow [2024-06-28 02:59:14,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 415 transitions, 5351 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-06-28 02:59:14,126 INFO L231 Difference]: Finished difference. Result has 241 places, 388 transitions, 4568 flow [2024-06-28 02:59:14,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4321, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4568, PETRI_PLACES=241, PETRI_TRANSITIONS=388} [2024-06-28 02:59:14,126 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-28 02:59:14,126 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 388 transitions, 4568 flow [2024-06-28 02:59:14,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:14,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:14,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:14,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 02:59:14,127 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:14,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:14,127 INFO L85 PathProgramCache]: Analyzing trace with hash 895428158, now seen corresponding path program 6 times [2024-06-28 02:59:14,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:14,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123623430] [2024-06-28 02:59:14,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:14,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:16,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:16,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:16,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123623430] [2024-06-28 02:59:16,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123623430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:16,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:16,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 02:59:16,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372769647] [2024-06-28 02:59:16,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:16,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 02:59:16,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:16,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 02:59:16,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 02:59:17,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:59:17,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 388 transitions, 4568 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:17,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:17,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:59:17,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:18,729 INFO L124 PetriNetUnfolderBase]: 4125/6169 cut-off events. [2024-06-28 02:59:18,729 INFO L125 PetriNetUnfolderBase]: For 634643/634655 co-relation queries the response was YES. [2024-06-28 02:59:18,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53742 conditions, 6169 events. 4125/6169 cut-off events. For 634643/634655 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 32326 event pairs, 890 based on Foata normal form. 12/6173 useless extension candidates. Maximal degree in co-relation 53638. Up to 5805 conditions per place. [2024-06-28 02:59:18,786 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 336 selfloop transitions, 79 changer transitions 0/418 dead transitions. [2024-06-28 02:59:18,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 418 transitions, 5610 flow [2024-06-28 02:59:18,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:59:18,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:59:18,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-28 02:59:18,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-28 02:59:18,787 INFO L175 Difference]: Start difference. First operand has 241 places, 388 transitions, 4568 flow. Second operand 9 states and 145 transitions. [2024-06-28 02:59:18,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 418 transitions, 5610 flow [2024-06-28 02:59:19,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 418 transitions, 5367 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-28 02:59:19,340 INFO L231 Difference]: Finished difference. Result has 243 places, 390 transitions, 4600 flow [2024-06-28 02:59:19,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4325, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4600, PETRI_PLACES=243, PETRI_TRANSITIONS=390} [2024-06-28 02:59:19,341 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-28 02:59:19,341 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 390 transitions, 4600 flow [2024-06-28 02:59:19,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:19,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:19,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:19,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 02:59:19,342 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:19,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:19,342 INFO L85 PathProgramCache]: Analyzing trace with hash -2146135815, now seen corresponding path program 10 times [2024-06-28 02:59:19,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:19,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867814135] [2024-06-28 02:59:19,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:19,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:22,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:22,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:22,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867814135] [2024-06-28 02:59:22,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867814135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:22,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:22,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 02:59:22,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423758574] [2024-06-28 02:59:22,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:22,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 02:59:22,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:22,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 02:59:22,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 02:59:22,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:59:22,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 390 transitions, 4600 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:22,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:22,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:59:22,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:23,798 INFO L124 PetriNetUnfolderBase]: 4115/6157 cut-off events. [2024-06-28 02:59:23,798 INFO L125 PetriNetUnfolderBase]: For 643065/643071 co-relation queries the response was YES. [2024-06-28 02:59:23,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53642 conditions, 6157 events. 4115/6157 cut-off events. For 643065/643071 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 32216 event pairs, 781 based on Foata normal form. 8/6145 useless extension candidates. Maximal degree in co-relation 53537. Up to 5734 conditions per place. [2024-06-28 02:59:23,869 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 317 selfloop transitions, 103 changer transitions 0/423 dead transitions. [2024-06-28 02:59:23,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 423 transitions, 5582 flow [2024-06-28 02:59:23,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:59:23,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:59:23,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-28 02:59:23,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-28 02:59:23,871 INFO L175 Difference]: Start difference. First operand has 243 places, 390 transitions, 4600 flow. Second operand 9 states and 149 transitions. [2024-06-28 02:59:23,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 423 transitions, 5582 flow [2024-06-28 02:59:24,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 423 transitions, 5289 flow, removed 69 selfloop flow, removed 7 redundant places. [2024-06-28 02:59:24,555 INFO L231 Difference]: Finished difference. Result has 246 places, 393 transitions, 4553 flow [2024-06-28 02:59:24,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4307, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4553, PETRI_PLACES=246, PETRI_TRANSITIONS=393} [2024-06-28 02:59:24,555 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-28 02:59:24,556 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 393 transitions, 4553 flow [2024-06-28 02:59:24,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:24,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:24,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:24,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 02:59:24,556 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:24,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:24,557 INFO L85 PathProgramCache]: Analyzing trace with hash 525766083, now seen corresponding path program 3 times [2024-06-28 02:59:24,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:24,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982344173] [2024-06-28 02:59:24,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:24,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:26,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:26,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:26,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982344173] [2024-06-28 02:59:26,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982344173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:26,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:26,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:59:26,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069518375] [2024-06-28 02:59:26,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:26,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:59:26,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:26,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:59:26,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:59:26,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:59:26,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 393 transitions, 4553 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:26,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:26,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:59:26,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:27,704 INFO L124 PetriNetUnfolderBase]: 4125/6171 cut-off events. [2024-06-28 02:59:27,704 INFO L125 PetriNetUnfolderBase]: For 655473/655479 co-relation queries the response was YES. [2024-06-28 02:59:27,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54029 conditions, 6171 events. 4125/6171 cut-off events. For 655473/655479 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 32261 event pairs, 858 based on Foata normal form. 6/6157 useless extension candidates. Maximal degree in co-relation 53922. Up to 5961 conditions per place. [2024-06-28 02:59:27,779 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 340 selfloop transitions, 69 changer transitions 0/412 dead transitions. [2024-06-28 02:59:27,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 412 transitions, 5668 flow [2024-06-28 02:59:27,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:59:27,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:59:27,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-28 02:59:27,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-28 02:59:27,780 INFO L175 Difference]: Start difference. First operand has 246 places, 393 transitions, 4553 flow. Second operand 8 states and 120 transitions. [2024-06-28 02:59:27,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 412 transitions, 5668 flow [2024-06-28 02:59:28,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 412 transitions, 5448 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 02:59:28,683 INFO L231 Difference]: Finished difference. Result has 248 places, 399 transitions, 4603 flow [2024-06-28 02:59:28,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4333, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4603, PETRI_PLACES=248, PETRI_TRANSITIONS=399} [2024-06-28 02:59:28,684 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 205 predicate places. [2024-06-28 02:59:28,684 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 399 transitions, 4603 flow [2024-06-28 02:59:28,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:28,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:28,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:28,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 02:59:28,684 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:28,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:28,685 INFO L85 PathProgramCache]: Analyzing trace with hash 525766486, now seen corresponding path program 2 times [2024-06-28 02:59:28,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:28,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360330525] [2024-06-28 02:59:28,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:28,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:28,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:30,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:30,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360330525] [2024-06-28 02:59:30,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360330525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:30,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:30,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:59:30,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487617871] [2024-06-28 02:59:30,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:30,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:59:30,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:30,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:59:30,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:59:30,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:59:30,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 399 transitions, 4603 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:30,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:30,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:59:30,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:31,946 INFO L124 PetriNetUnfolderBase]: 4130/6176 cut-off events. [2024-06-28 02:59:31,946 INFO L125 PetriNetUnfolderBase]: For 671947/671959 co-relation queries the response was YES. [2024-06-28 02:59:31,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54454 conditions, 6176 events. 4130/6176 cut-off events. For 671947/671959 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 32305 event pairs, 914 based on Foata normal form. 9/6177 useless extension candidates. Maximal degree in co-relation 54346. Up to 6110 conditions per place. [2024-06-28 02:59:32,021 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 379 selfloop transitions, 29 changer transitions 0/411 dead transitions. [2024-06-28 02:59:32,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 411 transitions, 5509 flow [2024-06-28 02:59:32,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:59:32,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:59:32,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-06-28 02:59:32,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35034013605442177 [2024-06-28 02:59:32,023 INFO L175 Difference]: Start difference. First operand has 248 places, 399 transitions, 4603 flow. Second operand 7 states and 103 transitions. [2024-06-28 02:59:32,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 411 transitions, 5509 flow [2024-06-28 02:59:32,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 411 transitions, 5399 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-28 02:59:32,852 INFO L231 Difference]: Finished difference. Result has 251 places, 402 transitions, 4625 flow [2024-06-28 02:59:32,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4493, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4625, PETRI_PLACES=251, PETRI_TRANSITIONS=402} [2024-06-28 02:59:32,852 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-28 02:59:32,853 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 402 transitions, 4625 flow [2024-06-28 02:59:32,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:32,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:32,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:32,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 02:59:32,853 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:32,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:32,854 INFO L85 PathProgramCache]: Analyzing trace with hash 526211956, now seen corresponding path program 3 times [2024-06-28 02:59:32,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:32,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797638580] [2024-06-28 02:59:32,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:32,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:32,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:34,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:34,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:34,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797638580] [2024-06-28 02:59:34,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797638580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:34,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:34,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:59:34,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676110442] [2024-06-28 02:59:34,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:34,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:59:34,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:34,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:59:34,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:59:34,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:59:34,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 402 transitions, 4625 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:34,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:34,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:59:34,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:36,024 INFO L124 PetriNetUnfolderBase]: 4127/6172 cut-off events. [2024-06-28 02:59:36,024 INFO L125 PetriNetUnfolderBase]: For 685042/685054 co-relation queries the response was YES. [2024-06-28 02:59:36,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54917 conditions, 6172 events. 4127/6172 cut-off events. For 685042/685054 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 32213 event pairs, 914 based on Foata normal form. 9/6173 useless extension candidates. Maximal degree in co-relation 54807. Up to 6095 conditions per place. [2024-06-28 02:59:36,094 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 377 selfloop transitions, 37 changer transitions 0/417 dead transitions. [2024-06-28 02:59:36,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 417 transitions, 5563 flow [2024-06-28 02:59:36,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:59:36,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:59:36,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-28 02:59:36,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35374149659863946 [2024-06-28 02:59:36,096 INFO L175 Difference]: Start difference. First operand has 251 places, 402 transitions, 4625 flow. Second operand 7 states and 104 transitions. [2024-06-28 02:59:36,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 417 transitions, 5563 flow [2024-06-28 02:59:36,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 417 transitions, 5453 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-28 02:59:36,805 INFO L231 Difference]: Finished difference. Result has 254 places, 408 transitions, 4700 flow [2024-06-28 02:59:36,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4515, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4700, PETRI_PLACES=254, PETRI_TRANSITIONS=408} [2024-06-28 02:59:36,806 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-28 02:59:36,806 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 408 transitions, 4700 flow [2024-06-28 02:59:36,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:36,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:36,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:36,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 02:59:36,807 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:36,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:36,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1449981083, now seen corresponding path program 4 times [2024-06-28 02:59:36,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:36,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498822576] [2024-06-28 02:59:36,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:36,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:36,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:38,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:38,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:38,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498822576] [2024-06-28 02:59:38,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498822576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:38,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:38,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:59:38,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477253945] [2024-06-28 02:59:38,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:38,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:59:38,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:38,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:59:38,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:59:38,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 02:59:38,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 408 transitions, 4700 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:38,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:38,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 02:59:38,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:39,563 INFO L124 PetriNetUnfolderBase]: 4146/6200 cut-off events. [2024-06-28 02:59:39,564 INFO L125 PetriNetUnfolderBase]: For 701811/701811 co-relation queries the response was YES. [2024-06-28 02:59:39,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55439 conditions, 6200 events. 4146/6200 cut-off events. For 701811/701811 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 32297 event pairs, 839 based on Foata normal form. 2/6199 useless extension candidates. Maximal degree in co-relation 55327. Up to 6012 conditions per place. [2024-06-28 02:59:39,646 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 370 selfloop transitions, 65 changer transitions 0/438 dead transitions. [2024-06-28 02:59:39,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 438 transitions, 5718 flow [2024-06-28 02:59:39,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:59:39,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:59:39,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-28 02:59:39,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-28 02:59:39,648 INFO L175 Difference]: Start difference. First operand has 254 places, 408 transitions, 4700 flow. Second operand 8 states and 129 transitions. [2024-06-28 02:59:39,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 438 transitions, 5718 flow [2024-06-28 02:59:40,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 438 transitions, 5593 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-28 02:59:40,337 INFO L231 Difference]: Finished difference. Result has 260 places, 417 transitions, 4832 flow [2024-06-28 02:59:40,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4578, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4832, PETRI_PLACES=260, PETRI_TRANSITIONS=417} [2024-06-28 02:59:40,339 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-28 02:59:40,339 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 417 transitions, 4832 flow [2024-06-28 02:59:40,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:40,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:40,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:40,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 02:59:40,340 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:40,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:40,340 INFO L85 PathProgramCache]: Analyzing trace with hash 319147611, now seen corresponding path program 1 times [2024-06-28 02:59:40,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:40,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668397917] [2024-06-28 02:59:40,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:40,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:40,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:42,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:42,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:42,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668397917] [2024-06-28 02:59:42,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668397917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:42,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:42,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:59:42,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882505251] [2024-06-28 02:59:42,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:42,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:59:42,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:42,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:59:42,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:59:42,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 02:59:42,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 417 transitions, 4832 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:42,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:42,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 02:59:42,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:43,557 INFO L124 PetriNetUnfolderBase]: 3990/6052 cut-off events. [2024-06-28 02:59:43,558 INFO L125 PetriNetUnfolderBase]: For 719388/719388 co-relation queries the response was YES. [2024-06-28 02:59:43,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54760 conditions, 6052 events. 3990/6052 cut-off events. For 719388/719388 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 32308 event pairs, 944 based on Foata normal form. 3/6052 useless extension candidates. Maximal degree in co-relation 54645. Up to 5867 conditions per place. [2024-06-28 02:59:43,633 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 414 selfloop transitions, 15 changer transitions 0/437 dead transitions. [2024-06-28 02:59:43,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 437 transitions, 5850 flow [2024-06-28 02:59:43,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:59:43,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:59:43,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-28 02:59:43,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-28 02:59:43,634 INFO L175 Difference]: Start difference. First operand has 260 places, 417 transitions, 4832 flow. Second operand 7 states and 115 transitions. [2024-06-28 02:59:43,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 437 transitions, 5850 flow [2024-06-28 02:59:44,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 437 transitions, 5695 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 02:59:44,511 INFO L231 Difference]: Finished difference. Result has 261 places, 420 transitions, 4763 flow [2024-06-28 02:59:44,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4677, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4763, PETRI_PLACES=261, PETRI_TRANSITIONS=420} [2024-06-28 02:59:44,512 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-28 02:59:44,512 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 420 transitions, 4763 flow [2024-06-28 02:59:44,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:44,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:44,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:44,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 02:59:44,513 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:44,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:44,513 INFO L85 PathProgramCache]: Analyzing trace with hash 319297558, now seen corresponding path program 1 times [2024-06-28 02:59:44,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:44,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640881290] [2024-06-28 02:59:44,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:44,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:46,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:46,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:46,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640881290] [2024-06-28 02:59:46,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640881290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:46,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:46,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:59:46,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041518078] [2024-06-28 02:59:46,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:46,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:59:46,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:46,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:59:46,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:59:46,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 02:59:46,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 420 transitions, 4763 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:46,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:46,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 02:59:46,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:47,986 INFO L124 PetriNetUnfolderBase]: 3995/6061 cut-off events. [2024-06-28 02:59:47,986 INFO L125 PetriNetUnfolderBase]: For 734082/734082 co-relation queries the response was YES. [2024-06-28 02:59:48,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55272 conditions, 6061 events. 3995/6061 cut-off events. For 734082/734082 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 32379 event pairs, 943 based on Foata normal form. 2/6060 useless extension candidates. Maximal degree in co-relation 55156. Up to 5886 conditions per place. [2024-06-28 02:59:48,063 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 412 selfloop transitions, 15 changer transitions 0/435 dead transitions. [2024-06-28 02:59:48,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 435 transitions, 5709 flow [2024-06-28 02:59:48,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:59:48,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:59:48,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-28 02:59:48,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-28 02:59:48,065 INFO L175 Difference]: Start difference. First operand has 261 places, 420 transitions, 4763 flow. Second operand 7 states and 110 transitions. [2024-06-28 02:59:48,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 435 transitions, 5709 flow [2024-06-28 02:59:48,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 435 transitions, 5645 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-28 02:59:48,919 INFO L231 Difference]: Finished difference. Result has 263 places, 423 transitions, 4791 flow [2024-06-28 02:59:48,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4699, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4791, PETRI_PLACES=263, PETRI_TRANSITIONS=423} [2024-06-28 02:59:48,920 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-28 02:59:48,920 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 423 transitions, 4791 flow [2024-06-28 02:59:48,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:48,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:48,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:48,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 02:59:48,921 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:48,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:48,921 INFO L85 PathProgramCache]: Analyzing trace with hash -806856739, now seen corresponding path program 2 times [2024-06-28 02:59:48,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:48,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496972524] [2024-06-28 02:59:48,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:48,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:48,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:50,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:50,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:50,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496972524] [2024-06-28 02:59:50,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496972524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:50,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:50,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:59:50,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027997050] [2024-06-28 02:59:50,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:50,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:59:50,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:50,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:59:50,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:59:50,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 02:59:50,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 423 transitions, 4791 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:50,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:50,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 02:59:50,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:52,193 INFO L124 PetriNetUnfolderBase]: 4005/6075 cut-off events. [2024-06-28 02:59:52,193 INFO L125 PetriNetUnfolderBase]: For 751374/751374 co-relation queries the response was YES. [2024-06-28 02:59:52,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55896 conditions, 6075 events. 4005/6075 cut-off events. For 751374/751374 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 32457 event pairs, 943 based on Foata normal form. 2/6074 useless extension candidates. Maximal degree in co-relation 55779. Up to 5897 conditions per place. [2024-06-28 02:59:52,271 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 416 selfloop transitions, 15 changer transitions 0/439 dead transitions. [2024-06-28 02:59:52,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 439 transitions, 5797 flow [2024-06-28 02:59:52,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:59:52,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:59:52,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-28 02:59:52,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-28 02:59:52,272 INFO L175 Difference]: Start difference. First operand has 263 places, 423 transitions, 4791 flow. Second operand 7 states and 111 transitions. [2024-06-28 02:59:52,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 439 transitions, 5797 flow [2024-06-28 02:59:52,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 439 transitions, 5727 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-28 02:59:52,986 INFO L231 Difference]: Finished difference. Result has 265 places, 426 transitions, 4851 flow [2024-06-28 02:59:52,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4721, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4851, PETRI_PLACES=265, PETRI_TRANSITIONS=426} [2024-06-28 02:59:52,986 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-28 02:59:52,986 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 426 transitions, 4851 flow [2024-06-28 02:59:52,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:52,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:52,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:52,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 02:59:52,987 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:52,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:52,987 INFO L85 PathProgramCache]: Analyzing trace with hash 140698871, now seen corresponding path program 3 times [2024-06-28 02:59:52,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:52,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080782096] [2024-06-28 02:59:52,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:52,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:53,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:54,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:54,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:54,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080782096] [2024-06-28 02:59:54,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080782096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:54,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:54,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:59:54,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37999408] [2024-06-28 02:59:54,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:54,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:59:54,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:54,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:59:54,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:59:55,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 02:59:55,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 426 transitions, 4851 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:55,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:55,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 02:59:55,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:59:56,481 INFO L124 PetriNetUnfolderBase]: 4007/6078 cut-off events. [2024-06-28 02:59:56,482 INFO L125 PetriNetUnfolderBase]: For 767836/767836 co-relation queries the response was YES. [2024-06-28 02:59:56,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56424 conditions, 6078 events. 4007/6078 cut-off events. For 767836/767836 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 32506 event pairs, 943 based on Foata normal form. 2/6077 useless extension candidates. Maximal degree in co-relation 56306. Up to 5906 conditions per place. [2024-06-28 02:59:56,550 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 416 selfloop transitions, 15 changer transitions 0/439 dead transitions. [2024-06-28 02:59:56,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 439 transitions, 5849 flow [2024-06-28 02:59:56,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:59:56,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:59:56,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-28 02:59:56,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-28 02:59:56,551 INFO L175 Difference]: Start difference. First operand has 265 places, 426 transitions, 4851 flow. Second operand 7 states and 108 transitions. [2024-06-28 02:59:56,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 439 transitions, 5849 flow [2024-06-28 02:59:57,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 439 transitions, 5741 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-28 02:59:57,323 INFO L231 Difference]: Finished difference. Result has 267 places, 429 transitions, 4879 flow [2024-06-28 02:59:57,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4743, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4879, PETRI_PLACES=267, PETRI_TRANSITIONS=429} [2024-06-28 02:59:57,323 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-28 02:59:57,323 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 429 transitions, 4879 flow [2024-06-28 02:59:57,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:57,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:59:57,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:59:57,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 02:59:57,324 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:59:57,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:59:57,324 INFO L85 PathProgramCache]: Analyzing trace with hash 140699088, now seen corresponding path program 2 times [2024-06-28 02:59:57,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:59:57,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495421705] [2024-06-28 02:59:57,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:59:57,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:59:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:59:59,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:59:59,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:59:59,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495421705] [2024-06-28 02:59:59,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495421705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:59:59,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:59:59,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:59:59,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936807171] [2024-06-28 02:59:59,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:59:59,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:59:59,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:59:59,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:59:59,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:59:59,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 02:59:59,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 429 transitions, 4879 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:59:59,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:59:59,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 02:59:59,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:00:00,561 INFO L124 PetriNetUnfolderBase]: 4022/6099 cut-off events. [2024-06-28 03:00:00,562 INFO L125 PetriNetUnfolderBase]: For 789567/789567 co-relation queries the response was YES. [2024-06-28 03:00:00,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57072 conditions, 6099 events. 4022/6099 cut-off events. For 789567/789567 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 32589 event pairs, 942 based on Foata normal form. 3/6099 useless extension candidates. Maximal degree in co-relation 56953. Up to 5925 conditions per place. [2024-06-28 03:00:00,633 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 419 selfloop transitions, 15 changer transitions 0/442 dead transitions. [2024-06-28 03:00:00,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 442 transitions, 5839 flow [2024-06-28 03:00:00,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:00:00,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:00:00,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-28 03:00:00,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-28 03:00:00,634 INFO L175 Difference]: Start difference. First operand has 267 places, 429 transitions, 4879 flow. Second operand 7 states and 108 transitions. [2024-06-28 03:00:00,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 442 transitions, 5839 flow [2024-06-28 03:00:01,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 442 transitions, 5725 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-28 03:00:01,532 INFO L231 Difference]: Finished difference. Result has 269 places, 432 transitions, 4867 flow [2024-06-28 03:00:01,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4765, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4867, PETRI_PLACES=269, PETRI_TRANSITIONS=432} [2024-06-28 03:00:01,533 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-28 03:00:01,533 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 432 transitions, 4867 flow [2024-06-28 03:00:01,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:01,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:00:01,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:00:01,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 03:00:01,534 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:00:01,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:00:01,534 INFO L85 PathProgramCache]: Analyzing trace with hash -336819144, now seen corresponding path program 3 times [2024-06-28 03:00:01,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:00:01,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114347111] [2024-06-28 03:00:01,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:00:01,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:00:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:00:03,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:00:03,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:00:03,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114347111] [2024-06-28 03:00:03,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114347111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:00:03,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:00:03,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:00:03,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003547839] [2024-06-28 03:00:03,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:00:03,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:00:03,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:00:03,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:00:03,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:00:03,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:00:03,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 432 transitions, 4867 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:03,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:00:03,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:00:03,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:00:04,866 INFO L124 PetriNetUnfolderBase]: 4021/6098 cut-off events. [2024-06-28 03:00:04,866 INFO L125 PetriNetUnfolderBase]: For 800034/800034 co-relation queries the response was YES. [2024-06-28 03:00:04,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57371 conditions, 6098 events. 4021/6098 cut-off events. For 800034/800034 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 32669 event pairs, 942 based on Foata normal form. 3/6098 useless extension candidates. Maximal degree in co-relation 57251. Up to 5922 conditions per place. [2024-06-28 03:00:04,952 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 423 selfloop transitions, 17 changer transitions 0/448 dead transitions. [2024-06-28 03:00:04,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 448 transitions, 5861 flow [2024-06-28 03:00:04,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:00:04,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:00:04,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-28 03:00:04,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-28 03:00:04,954 INFO L175 Difference]: Start difference. First operand has 269 places, 432 transitions, 4867 flow. Second operand 7 states and 108 transitions. [2024-06-28 03:00:04,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 448 transitions, 5861 flow [2024-06-28 03:00:05,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 448 transitions, 5785 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-28 03:00:05,737 INFO L231 Difference]: Finished difference. Result has 272 places, 438 transitions, 4932 flow [2024-06-28 03:00:05,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4791, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4932, PETRI_PLACES=272, PETRI_TRANSITIONS=438} [2024-06-28 03:00:05,737 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-28 03:00:05,738 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 438 transitions, 4932 flow [2024-06-28 03:00:05,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:05,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:00:05,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:00:05,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 03:00:05,738 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:00:05,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:00:05,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1887570550, now seen corresponding path program 1 times [2024-06-28 03:00:05,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:00:05,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413078246] [2024-06-28 03:00:05,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:00:05,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:00:05,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:00:09,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:00:09,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:00:09,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413078246] [2024-06-28 03:00:09,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413078246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:00:09,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:00:09,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 03:00:09,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888213993] [2024-06-28 03:00:09,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:00:09,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 03:00:09,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:00:09,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 03:00:09,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-28 03:00:09,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:00:09,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 438 transitions, 4932 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-28 03:00:09,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:00:09,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:00:09,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:00:11,541 INFO L124 PetriNetUnfolderBase]: 4192/6260 cut-off events. [2024-06-28 03:00:11,541 INFO L125 PetriNetUnfolderBase]: For 810837/810841 co-relation queries the response was YES. [2024-06-28 03:00:11,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59176 conditions, 6260 events. 4192/6260 cut-off events. For 810837/810841 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 32735 event pairs, 754 based on Foata normal form. 6/6263 useless extension candidates. Maximal degree in co-relation 59054. Up to 5608 conditions per place. [2024-06-28 03:00:11,613 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 335 selfloop transitions, 151 changer transitions 0/489 dead transitions. [2024-06-28 03:00:11,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 489 transitions, 6216 flow [2024-06-28 03:00:11,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:00:11,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:00:11,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-28 03:00:11,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-28 03:00:11,614 INFO L175 Difference]: Start difference. First operand has 272 places, 438 transitions, 4932 flow. Second operand 10 states and 164 transitions. [2024-06-28 03:00:11,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 489 transitions, 6216 flow [2024-06-28 03:00:12,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 489 transitions, 6109 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-28 03:00:12,310 INFO L231 Difference]: Finished difference. Result has 279 places, 451 transitions, 5355 flow [2024-06-28 03:00:12,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4825, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5355, PETRI_PLACES=279, PETRI_TRANSITIONS=451} [2024-06-28 03:00:12,311 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-28 03:00:12,311 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 451 transitions, 5355 flow [2024-06-28 03:00:12,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-28 03:00:12,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:00:12,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:00:12,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 03:00:12,311 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:00:12,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:00:12,312 INFO L85 PathProgramCache]: Analyzing trace with hash 804523948, now seen corresponding path program 1 times [2024-06-28 03:00:12,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:00:12,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938343270] [2024-06-28 03:00:12,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:00:12,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:00:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:00:15,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:00:15,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:00:15,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938343270] [2024-06-28 03:00:15,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938343270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:00:15,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:00:15,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 03:00:15,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812016485] [2024-06-28 03:00:15,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:00:15,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 03:00:15,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:00:15,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 03:00:15,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-28 03:00:15,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:00:15,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 451 transitions, 5355 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-28 03:00:15,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:00:15,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:00:15,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:00:17,535 INFO L124 PetriNetUnfolderBase]: 4267/6386 cut-off events. [2024-06-28 03:00:17,535 INFO L125 PetriNetUnfolderBase]: For 889538/889542 co-relation queries the response was YES. [2024-06-28 03:00:17,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61459 conditions, 6386 events. 4267/6386 cut-off events. For 889538/889542 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 33678 event pairs, 749 based on Foata normal form. 24/6407 useless extension candidates. Maximal degree in co-relation 61335. Up to 5767 conditions per place. [2024-06-28 03:00:17,633 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 398 selfloop transitions, 101 changer transitions 0/502 dead transitions. [2024-06-28 03:00:17,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 502 transitions, 6659 flow [2024-06-28 03:00:17,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:00:17,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:00:17,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-28 03:00:17,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3917748917748918 [2024-06-28 03:00:17,635 INFO L175 Difference]: Start difference. First operand has 279 places, 451 transitions, 5355 flow. Second operand 11 states and 181 transitions. [2024-06-28 03:00:17,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 502 transitions, 6659 flow [2024-06-28 03:00:18,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 502 transitions, 6173 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-28 03:00:18,650 INFO L231 Difference]: Finished difference. Result has 282 places, 452 transitions, 5158 flow [2024-06-28 03:00:18,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4869, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5158, PETRI_PLACES=282, PETRI_TRANSITIONS=452} [2024-06-28 03:00:18,651 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-28 03:00:18,651 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 452 transitions, 5158 flow [2024-06-28 03:00:18,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-28 03:00:18,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:00:18,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:00:18,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 03:00:18,651 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:00:18,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:00:18,652 INFO L85 PathProgramCache]: Analyzing trace with hash 99786466, now seen corresponding path program 1 times [2024-06-28 03:00:18,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:00:18,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763658717] [2024-06-28 03:00:18,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:00:18,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:00:18,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:00:20,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:00:20,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:00:20,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763658717] [2024-06-28 03:00:20,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763658717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:00:20,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:00:20,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:00:20,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693906260] [2024-06-28 03:00:20,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:00:20,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:00:20,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:00:20,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:00:20,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:00:20,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:00:20,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 452 transitions, 5158 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:20,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:00:20,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:00:20,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:00:21,535 INFO L124 PetriNetUnfolderBase]: 4272/6394 cut-off events. [2024-06-28 03:00:21,535 INFO L125 PetriNetUnfolderBase]: For 864532/864536 co-relation queries the response was YES. [2024-06-28 03:00:21,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60996 conditions, 6394 events. 4272/6394 cut-off events. For 864532/864536 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 33731 event pairs, 895 based on Foata normal form. 5/6396 useless extension candidates. Maximal degree in co-relation 60872. Up to 6317 conditions per place. [2024-06-28 03:00:21,615 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 441 selfloop transitions, 28 changer transitions 0/472 dead transitions. [2024-06-28 03:00:21,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 472 transitions, 6252 flow [2024-06-28 03:00:21,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:00:21,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:00:21,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-28 03:00:21,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-28 03:00:21,617 INFO L175 Difference]: Start difference. First operand has 282 places, 452 transitions, 5158 flow. Second operand 7 states and 110 transitions. [2024-06-28 03:00:21,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 472 transitions, 6252 flow [2024-06-28 03:00:22,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 472 transitions, 5971 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-28 03:00:22,528 INFO L231 Difference]: Finished difference. Result has 280 places, 455 transitions, 5041 flow [2024-06-28 03:00:22,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4877, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5041, PETRI_PLACES=280, PETRI_TRANSITIONS=455} [2024-06-28 03:00:22,529 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-28 03:00:22,529 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 455 transitions, 5041 flow [2024-06-28 03:00:22,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:22,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:00:22,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:00:22,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 03:00:22,529 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:00:22,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:00:22,530 INFO L85 PathProgramCache]: Analyzing trace with hash 106452706, now seen corresponding path program 2 times [2024-06-28 03:00:22,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:00:22,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115688779] [2024-06-28 03:00:22,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:00:22,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:00:22,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:00:24,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:00:24,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:00:24,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115688779] [2024-06-28 03:00:24,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115688779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:00:24,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:00:24,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:00:24,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505188075] [2024-06-28 03:00:24,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:00:24,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:00:24,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:00:24,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:00:24,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:00:24,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:00:24,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 455 transitions, 5041 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:24,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:00:24,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:00:24,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:00:25,558 INFO L124 PetriNetUnfolderBase]: 4277/6401 cut-off events. [2024-06-28 03:00:25,558 INFO L125 PetriNetUnfolderBase]: For 873913/873917 co-relation queries the response was YES. [2024-06-28 03:00:25,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60704 conditions, 6401 events. 4277/6401 cut-off events. For 873913/873917 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 33813 event pairs, 895 based on Foata normal form. 5/6403 useless extension candidates. Maximal degree in co-relation 60579. Up to 6338 conditions per place. [2024-06-28 03:00:25,641 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 441 selfloop transitions, 28 changer transitions 0/472 dead transitions. [2024-06-28 03:00:25,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 472 transitions, 6127 flow [2024-06-28 03:00:25,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:00:25,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:00:25,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-28 03:00:25,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36394557823129253 [2024-06-28 03:00:25,643 INFO L175 Difference]: Start difference. First operand has 280 places, 455 transitions, 5041 flow. Second operand 7 states and 107 transitions. [2024-06-28 03:00:25,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 472 transitions, 6127 flow [2024-06-28 03:00:26,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 472 transitions, 5989 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-28 03:00:26,639 INFO L231 Difference]: Finished difference. Result has 282 places, 458 transitions, 5073 flow [2024-06-28 03:00:26,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4903, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5073, PETRI_PLACES=282, PETRI_TRANSITIONS=458} [2024-06-28 03:00:26,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-28 03:00:26,640 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 458 transitions, 5073 flow [2024-06-28 03:00:26,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:26,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:00:26,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:00:26,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 03:00:26,640 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:00:26,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:00:26,641 INFO L85 PathProgramCache]: Analyzing trace with hash 763476864, now seen corresponding path program 2 times [2024-06-28 03:00:26,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:00:26,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200348800] [2024-06-28 03:00:26,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:00:26,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:00:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:00:29,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:00:29,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:00:29,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200348800] [2024-06-28 03:00:29,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200348800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:00:29,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:00:29,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 03:00:29,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266300727] [2024-06-28 03:00:29,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:00:29,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 03:00:29,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:00:29,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 03:00:29,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-28 03:00:29,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:00:29,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 458 transitions, 5073 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-28 03:00:29,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:00:29,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:00:29,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:00:31,578 INFO L124 PetriNetUnfolderBase]: 4369/6553 cut-off events. [2024-06-28 03:00:31,579 INFO L125 PetriNetUnfolderBase]: For 956376/956380 co-relation queries the response was YES. [2024-06-28 03:00:31,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62556 conditions, 6553 events. 4369/6553 cut-off events. For 956376/956380 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 34903 event pairs, 890 based on Foata normal form. 24/6574 useless extension candidates. Maximal degree in co-relation 62430. Up to 6177 conditions per place. [2024-06-28 03:00:31,671 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 451 selfloop transitions, 52 changer transitions 0/506 dead transitions. [2024-06-28 03:00:31,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 506 transitions, 6385 flow [2024-06-28 03:00:31,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:00:31,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:00:31,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-28 03:00:31,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-28 03:00:31,672 INFO L175 Difference]: Start difference. First operand has 282 places, 458 transitions, 5073 flow. Second operand 11 states and 183 transitions. [2024-06-28 03:00:31,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 506 transitions, 6385 flow [2024-06-28 03:00:32,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 506 transitions, 6241 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-28 03:00:32,633 INFO L231 Difference]: Finished difference. Result has 288 places, 460 transitions, 5148 flow [2024-06-28 03:00:32,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4929, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5148, PETRI_PLACES=288, PETRI_TRANSITIONS=460} [2024-06-28 03:00:32,634 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-28 03:00:32,634 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 460 transitions, 5148 flow [2024-06-28 03:00:32,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-28 03:00:32,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:00:32,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:00:32,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 03:00:32,635 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:00:32,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:00:32,635 INFO L85 PathProgramCache]: Analyzing trace with hash -2058582612, now seen corresponding path program 3 times [2024-06-28 03:00:32,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:00:32,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150278931] [2024-06-28 03:00:32,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:00:32,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:00:32,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:00:36,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:00:36,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:00:36,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150278931] [2024-06-28 03:00:36,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150278931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:00:36,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:00:36,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 03:00:36,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882477379] [2024-06-28 03:00:36,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:00:36,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 03:00:36,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:00:36,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 03:00:36,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-28 03:00:36,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:00:36,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 460 transitions, 5148 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-28 03:00:36,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:00:36,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:00:36,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:00:39,069 INFO L124 PetriNetUnfolderBase]: 4444/6678 cut-off events. [2024-06-28 03:00:39,069 INFO L125 PetriNetUnfolderBase]: For 994159/994159 co-relation queries the response was YES. [2024-06-28 03:00:39,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64233 conditions, 6678 events. 4444/6678 cut-off events. For 994159/994159 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 35773 event pairs, 783 based on Foata normal form. 20/6695 useless extension candidates. Maximal degree in co-relation 64106. Up to 6175 conditions per place. [2024-06-28 03:00:39,173 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 403 selfloop transitions, 101 changer transitions 0/507 dead transitions. [2024-06-28 03:00:39,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 507 transitions, 6438 flow [2024-06-28 03:00:39,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:00:39,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:00:39,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-28 03:00:39,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3917748917748918 [2024-06-28 03:00:39,175 INFO L175 Difference]: Start difference. First operand has 288 places, 460 transitions, 5148 flow. Second operand 11 states and 181 transitions. [2024-06-28 03:00:39,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 507 transitions, 6438 flow [2024-06-28 03:00:40,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 507 transitions, 6281 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-28 03:00:40,166 INFO L231 Difference]: Finished difference. Result has 290 places, 461 transitions, 5284 flow [2024-06-28 03:00:40,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4991, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5284, PETRI_PLACES=290, PETRI_TRANSITIONS=461} [2024-06-28 03:00:40,167 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-28 03:00:40,167 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 461 transitions, 5284 flow [2024-06-28 03:00:40,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-28 03:00:40,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:00:40,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:00:40,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 03:00:40,168 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:00:40,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:00:40,168 INFO L85 PathProgramCache]: Analyzing trace with hash 102678512, now seen corresponding path program 4 times [2024-06-28 03:00:40,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:00:40,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184564290] [2024-06-28 03:00:40,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:00:40,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:00:40,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:00:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:00:43,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:00:43,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184564290] [2024-06-28 03:00:43,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184564290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:00:43,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:00:43,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 03:00:43,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019590800] [2024-06-28 03:00:43,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:00:43,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 03:00:43,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:00:43,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 03:00:43,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-28 03:00:43,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:00:43,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 461 transitions, 5284 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-28 03:00:43,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:00:43,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:00:43,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:00:45,987 INFO L124 PetriNetUnfolderBase]: 4536/6830 cut-off events. [2024-06-28 03:00:45,987 INFO L125 PetriNetUnfolderBase]: For 1020933/1020937 co-relation queries the response was YES. [2024-06-28 03:00:46,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65564 conditions, 6830 events. 4536/6830 cut-off events. For 1020933/1020937 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 36942 event pairs, 925 based on Foata normal form. 24/6851 useless extension candidates. Maximal degree in co-relation 65436. Up to 6344 conditions per place. [2024-06-28 03:00:46,089 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 454 selfloop transitions, 52 changer transitions 0/509 dead transitions. [2024-06-28 03:00:46,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 509 transitions, 6608 flow [2024-06-28 03:00:46,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:00:46,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:00:46,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-28 03:00:46,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-06-28 03:00:46,091 INFO L175 Difference]: Start difference. First operand has 290 places, 461 transitions, 5284 flow. Second operand 11 states and 182 transitions. [2024-06-28 03:00:46,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 509 transitions, 6608 flow [2024-06-28 03:00:47,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 509 transitions, 6347 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-28 03:00:47,061 INFO L231 Difference]: Finished difference. Result has 292 places, 464 transitions, 5261 flow [2024-06-28 03:00:47,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5023, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5261, PETRI_PLACES=292, PETRI_TRANSITIONS=464} [2024-06-28 03:00:47,062 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-28 03:00:47,062 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 464 transitions, 5261 flow [2024-06-28 03:00:47,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-28 03:00:47,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:00:47,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:00:47,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 03:00:47,063 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:00:47,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:00:47,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1885853712, now seen corresponding path program 5 times [2024-06-28 03:00:47,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:00:47,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88304789] [2024-06-28 03:00:47,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:00:47,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:00:47,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:00:49,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:00:49,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:00:49,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88304789] [2024-06-28 03:00:49,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88304789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:00:49,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:00:49,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:00:49,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376400451] [2024-06-28 03:00:49,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:00:49,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:00:49,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:00:49,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:00:49,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:00:49,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:00:49,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 464 transitions, 5261 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:49,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:00:49,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:00:49,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:00:51,959 INFO L124 PetriNetUnfolderBase]: 4655/7031 cut-off events. [2024-06-28 03:00:51,959 INFO L125 PetriNetUnfolderBase]: For 1073598/1073602 co-relation queries the response was YES. [2024-06-28 03:00:52,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68128 conditions, 7031 events. 4655/7031 cut-off events. For 1073598/1073602 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 38445 event pairs, 947 based on Foata normal form. 20/7048 useless extension candidates. Maximal degree in co-relation 67999. Up to 6192 conditions per place. [2024-06-28 03:00:52,060 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 455 selfloop transitions, 54 changer transitions 0/512 dead transitions. [2024-06-28 03:00:52,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 512 transitions, 6961 flow [2024-06-28 03:00:52,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:00:52,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:00:52,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-28 03:00:52,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 03:00:52,061 INFO L175 Difference]: Start difference. First operand has 292 places, 464 transitions, 5261 flow. Second operand 10 states and 170 transitions. [2024-06-28 03:00:52,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 512 transitions, 6961 flow [2024-06-28 03:00:53,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 512 transitions, 6801 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-28 03:00:53,103 INFO L231 Difference]: Finished difference. Result has 293 places, 466 transitions, 5389 flow [2024-06-28 03:00:53,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5101, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5389, PETRI_PLACES=293, PETRI_TRANSITIONS=466} [2024-06-28 03:00:53,103 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-28 03:00:53,103 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 466 transitions, 5389 flow [2024-06-28 03:00:53,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:53,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:00:53,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:00:53,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 03:00:53,104 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:00:53,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:00:53,104 INFO L85 PathProgramCache]: Analyzing trace with hash -559850596, now seen corresponding path program 1 times [2024-06-28 03:00:53,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:00:53,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208978662] [2024-06-28 03:00:53,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:00:53,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:00:53,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:00:55,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:00:55,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:00:55,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208978662] [2024-06-28 03:00:55,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208978662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:00:55,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:00:55,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:00:55,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864637483] [2024-06-28 03:00:55,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:00:55,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:00:55,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:00:55,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:00:55,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:00:55,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:00:55,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 466 transitions, 5389 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:55,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:00:55,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:00:55,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:00:56,915 INFO L124 PetriNetUnfolderBase]: 4665/7049 cut-off events. [2024-06-28 03:00:56,916 INFO L125 PetriNetUnfolderBase]: For 1050339/1050343 co-relation queries the response was YES. [2024-06-28 03:00:56,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68002 conditions, 7049 events. 4665/7049 cut-off events. For 1050339/1050343 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 38690 event pairs, 990 based on Foata normal form. 6/7052 useless extension candidates. Maximal degree in co-relation 67872. Up to 6854 conditions per place. [2024-06-28 03:00:57,010 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 429 selfloop transitions, 59 changer transitions 0/491 dead transitions. [2024-06-28 03:00:57,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 491 transitions, 6503 flow [2024-06-28 03:00:57,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:00:57,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:00:57,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-28 03:00:57,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-28 03:00:57,012 INFO L175 Difference]: Start difference. First operand has 293 places, 466 transitions, 5389 flow. Second operand 8 states and 127 transitions. [2024-06-28 03:00:57,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 491 transitions, 6503 flow [2024-06-28 03:00:58,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 491 transitions, 6376 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-28 03:00:58,150 INFO L231 Difference]: Finished difference. Result has 295 places, 469 transitions, 5454 flow [2024-06-28 03:00:58,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5262, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5454, PETRI_PLACES=295, PETRI_TRANSITIONS=469} [2024-06-28 03:00:58,151 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-28 03:00:58,151 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 469 transitions, 5454 flow [2024-06-28 03:00:58,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:00:58,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:00:58,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:00:58,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 03:00:58,151 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:00:58,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:00:58,152 INFO L85 PathProgramCache]: Analyzing trace with hash -387022528, now seen corresponding path program 2 times [2024-06-28 03:00:58,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:00:58,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339141376] [2024-06-28 03:00:58,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:00:58,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:00:58,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:01:00,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:01:00,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:01:00,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339141376] [2024-06-28 03:01:00,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339141376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:01:00,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:01:00,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:01:00,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445275163] [2024-06-28 03:01:00,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:01:00,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:01:00,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:01:00,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:01:00,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:01:00,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:01:00,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 469 transitions, 5454 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:01:00,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:01:00,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:01:00,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:01:01,954 INFO L124 PetriNetUnfolderBase]: 4675/7059 cut-off events. [2024-06-28 03:01:01,954 INFO L125 PetriNetUnfolderBase]: For 1058534/1058534 co-relation queries the response was YES. [2024-06-28 03:01:02,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68401 conditions, 7059 events. 4675/7059 cut-off events. For 1058534/1058534 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 38667 event pairs, 944 based on Foata normal form. 2/7058 useless extension candidates. Maximal degree in co-relation 68269. Up to 6841 conditions per place. [2024-06-28 03:01:02,038 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 414 selfloop transitions, 73 changer transitions 0/490 dead transitions. [2024-06-28 03:01:02,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 490 transitions, 6556 flow [2024-06-28 03:01:02,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:01:02,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:01:02,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-28 03:01:02,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-28 03:01:02,039 INFO L175 Difference]: Start difference. First operand has 295 places, 469 transitions, 5454 flow. Second operand 8 states and 124 transitions. [2024-06-28 03:01:02,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 490 transitions, 6556 flow [2024-06-28 03:01:03,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 490 transitions, 6390 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-28 03:01:03,270 INFO L231 Difference]: Finished difference. Result has 297 places, 472 transitions, 5514 flow [2024-06-28 03:01:03,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5288, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5514, PETRI_PLACES=297, PETRI_TRANSITIONS=472} [2024-06-28 03:01:03,271 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-28 03:01:03,271 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 472 transitions, 5514 flow [2024-06-28 03:01:03,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:01:03,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:01:03,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:01:03,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 03:01:03,272 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:01:03,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:01:03,273 INFO L85 PathProgramCache]: Analyzing trace with hash -549661516, now seen corresponding path program 3 times [2024-06-28 03:01:03,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:01:03,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761950001] [2024-06-28 03:01:03,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:01:03,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:01:03,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:01:05,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:01:05,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:01:05,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761950001] [2024-06-28 03:01:05,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761950001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:01:05,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:01:05,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:01:05,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797227180] [2024-06-28 03:01:05,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:01:05,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:01:05,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:01:05,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:01:05,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:01:05,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:01:05,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 472 transitions, 5514 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:01:05,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:01:05,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:01:05,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:01:07,567 INFO L124 PetriNetUnfolderBase]: 4685/7073 cut-off events. [2024-06-28 03:01:07,568 INFO L125 PetriNetUnfolderBase]: For 1081179/1081179 co-relation queries the response was YES. [2024-06-28 03:01:07,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69185 conditions, 7073 events. 4685/7073 cut-off events. For 1081179/1081179 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 38727 event pairs, 944 based on Foata normal form. 2/7072 useless extension candidates. Maximal degree in co-relation 69052. Up to 6826 conditions per place. [2024-06-28 03:01:07,662 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 411 selfloop transitions, 79 changer transitions 0/493 dead transitions. [2024-06-28 03:01:07,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 493 transitions, 6628 flow [2024-06-28 03:01:07,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:01:07,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:01:07,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-28 03:01:07,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-28 03:01:07,664 INFO L175 Difference]: Start difference. First operand has 297 places, 472 transitions, 5514 flow. Second operand 8 states and 125 transitions. [2024-06-28 03:01:07,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 493 transitions, 6628 flow [2024-06-28 03:01:09,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 493 transitions, 6428 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-28 03:01:09,040 INFO L231 Difference]: Finished difference. Result has 299 places, 475 transitions, 5556 flow [2024-06-28 03:01:09,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5314, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5556, PETRI_PLACES=299, PETRI_TRANSITIONS=475} [2024-06-28 03:01:09,040 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-28 03:01:09,041 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 475 transitions, 5556 flow [2024-06-28 03:01:09,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:01:09,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:01:09,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:01:09,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 03:01:09,041 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:01:09,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:01:09,041 INFO L85 PathProgramCache]: Analyzing trace with hash 106461634, now seen corresponding path program 1 times [2024-06-28 03:01:09,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:01:09,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478321100] [2024-06-28 03:01:09,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:01:09,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:01:09,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:01:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:01:10,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:01:10,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478321100] [2024-06-28 03:01:10,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478321100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:01:10,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:01:10,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:01:10,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480141125] [2024-06-28 03:01:10,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:01:10,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:01:10,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:01:10,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:01:10,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:01:10,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:01:10,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 475 transitions, 5556 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:01:10,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:01:10,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:01:10,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:01:12,667 INFO L124 PetriNetUnfolderBase]: 4695/7087 cut-off events. [2024-06-28 03:01:12,667 INFO L125 PetriNetUnfolderBase]: For 1096702/1096706 co-relation queries the response was YES. [2024-06-28 03:01:12,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69992 conditions, 7087 events. 4695/7087 cut-off events. For 1096702/1096706 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 38880 event pairs, 1009 based on Foata normal form. 6/7090 useless extension candidates. Maximal degree in co-relation 69858. Up to 7018 conditions per place. [2024-06-28 03:01:12,762 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 460 selfloop transitions, 31 changer transitions 0/494 dead transitions. [2024-06-28 03:01:12,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 494 transitions, 6678 flow [2024-06-28 03:01:12,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:01:12,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:01:12,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-28 03:01:12,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-28 03:01:12,764 INFO L175 Difference]: Start difference. First operand has 299 places, 475 transitions, 5556 flow. Second operand 8 states and 119 transitions. [2024-06-28 03:01:12,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 494 transitions, 6678 flow [2024-06-28 03:01:14,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 494 transitions, 6458 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-28 03:01:14,266 INFO L231 Difference]: Finished difference. Result has 301 places, 478 transitions, 5494 flow [2024-06-28 03:01:14,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5336, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5494, PETRI_PLACES=301, PETRI_TRANSITIONS=478} [2024-06-28 03:01:14,266 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-28 03:01:14,267 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 478 transitions, 5494 flow [2024-06-28 03:01:14,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:01:14,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:01:14,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:01:14,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 03:01:14,267 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:01:14,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:01:14,268 INFO L85 PathProgramCache]: Analyzing trace with hash 744858178, now seen corresponding path program 3 times [2024-06-28 03:01:14,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:01:14,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104635981] [2024-06-28 03:01:14,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:01:14,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:01:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:01:15,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:01:15,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:01:15,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104635981] [2024-06-28 03:01:15,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104635981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:01:15,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:01:15,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:01:15,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45745100] [2024-06-28 03:01:15,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:01:15,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:01:15,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:01:15,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:01:15,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:01:16,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:01:16,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 478 transitions, 5494 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:01:16,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:01:16,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:01:16,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:01:17,692 INFO L124 PetriNetUnfolderBase]: 4700/7096 cut-off events. [2024-06-28 03:01:17,692 INFO L125 PetriNetUnfolderBase]: For 1113278/1113290 co-relation queries the response was YES. [2024-06-28 03:01:17,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70440 conditions, 7096 events. 4700/7096 cut-off events. For 1113278/1113290 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 38926 event pairs, 1012 based on Foata normal form. 9/7097 useless extension candidates. Maximal degree in co-relation 70305. Up to 7003 conditions per place. [2024-06-28 03:01:17,776 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 461 selfloop transitions, 32 changer transitions 0/496 dead transitions. [2024-06-28 03:01:17,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 496 transitions, 6644 flow [2024-06-28 03:01:17,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:01:17,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:01:17,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-28 03:01:17,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3707482993197279 [2024-06-28 03:01:17,777 INFO L175 Difference]: Start difference. First operand has 301 places, 478 transitions, 5494 flow. Second operand 7 states and 109 transitions. [2024-06-28 03:01:17,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 496 transitions, 6644 flow [2024-06-28 03:01:19,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 496 transitions, 6508 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-28 03:01:19,054 INFO L231 Difference]: Finished difference. Result has 302 places, 481 transitions, 5542 flow [2024-06-28 03:01:19,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5358, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5542, PETRI_PLACES=302, PETRI_TRANSITIONS=481} [2024-06-28 03:01:19,054 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-28 03:01:19,054 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 481 transitions, 5542 flow [2024-06-28 03:01:19,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:01:19,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:01:19,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:01:19,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 03:01:19,055 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:01:19,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:01:19,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1308276450, now seen corresponding path program 4 times [2024-06-28 03:01:19,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:01:19,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048973720] [2024-06-28 03:01:19,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:01:19,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:01:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:01:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:01:20,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:01:20,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048973720] [2024-06-28 03:01:20,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048973720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:01:20,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:01:20,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:01:20,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743395325] [2024-06-28 03:01:20,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:01:20,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:01:20,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:01:20,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:01:20,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:01:20,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:01:20,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 481 transitions, 5542 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:01:20,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:01:20,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:01:20,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:01:22,669 INFO L124 PetriNetUnfolderBase]: 4705/7103 cut-off events. [2024-06-28 03:01:22,669 INFO L125 PetriNetUnfolderBase]: For 1136257/1136269 co-relation queries the response was YES. [2024-06-28 03:01:22,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71024 conditions, 7103 events. 4705/7103 cut-off events. For 1136257/1136269 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 38969 event pairs, 1012 based on Foata normal form. 9/7104 useless extension candidates. Maximal degree in co-relation 70888. Up to 6997 conditions per place. [2024-06-28 03:01:22,762 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 453 selfloop transitions, 40 changer transitions 0/496 dead transitions. [2024-06-28 03:01:22,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 496 transitions, 6684 flow [2024-06-28 03:01:22,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:01:22,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:01:22,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-28 03:01:22,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36394557823129253 [2024-06-28 03:01:22,763 INFO L175 Difference]: Start difference. First operand has 302 places, 481 transitions, 5542 flow. Second operand 7 states and 107 transitions. [2024-06-28 03:01:22,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 496 transitions, 6684 flow [2024-06-28 03:01:24,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 496 transitions, 6522 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-28 03:01:24,270 INFO L231 Difference]: Finished difference. Result has 304 places, 484 transitions, 5586 flow [2024-06-28 03:01:24,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5380, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5586, PETRI_PLACES=304, PETRI_TRANSITIONS=484} [2024-06-28 03:01:24,270 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-28 03:01:24,271 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 484 transitions, 5586 flow [2024-06-28 03:01:24,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:01:24,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:01:24,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:01:24,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 03:01:24,271 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:01:24,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:01:24,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1859746338, now seen corresponding path program 5 times [2024-06-28 03:01:24,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:01:24,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550530804] [2024-06-28 03:01:24,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:01:24,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:01:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:01:25,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:01:25,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:01:25,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550530804] [2024-06-28 03:01:25,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550530804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:01:25,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:01:25,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:01:25,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492182156] [2024-06-28 03:01:25,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:01:25,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:01:25,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:01:25,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:01:25,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:01:25,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:01:25,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 484 transitions, 5586 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:01:25,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:01:25,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:01:25,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:01:27,487 INFO L124 PetriNetUnfolderBase]: 4710/7110 cut-off events. [2024-06-28 03:01:27,487 INFO L125 PetriNetUnfolderBase]: For 1160120/1160132 co-relation queries the response was YES. [2024-06-28 03:01:27,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71655 conditions, 7110 events. 4710/7110 cut-off events. For 1160120/1160132 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 38990 event pairs, 1012 based on Foata normal form. 9/7111 useless extension candidates. Maximal degree in co-relation 71518. Up to 7029 conditions per place. [2024-06-28 03:01:27,584 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 457 selfloop transitions, 40 changer transitions 0/500 dead transitions. [2024-06-28 03:01:27,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 500 transitions, 7032 flow [2024-06-28 03:01:27,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:01:27,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:01:27,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-28 03:01:27,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-28 03:01:27,585 INFO L175 Difference]: Start difference. First operand has 304 places, 484 transitions, 5586 flow. Second operand 7 states and 105 transitions. [2024-06-28 03:01:27,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 500 transitions, 7032 flow [2024-06-28 03:01:28,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 500 transitions, 6848 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-28 03:01:28,860 INFO L231 Difference]: Finished difference. Result has 306 places, 490 transitions, 5734 flow [2024-06-28 03:01:28,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5402, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5734, PETRI_PLACES=306, PETRI_TRANSITIONS=490} [2024-06-28 03:01:28,860 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-28 03:01:28,860 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 490 transitions, 5734 flow [2024-06-28 03:01:28,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:01:28,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:01:28,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:01:28,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 03:01:28,861 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:01:28,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:01:28,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1865460258, now seen corresponding path program 6 times [2024-06-28 03:01:28,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:01:28,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215112470] [2024-06-28 03:01:28,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:01:28,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:01:28,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:01:30,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:01:30,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:01:30,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215112470] [2024-06-28 03:01:30,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215112470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:01:30,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:01:30,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:01:30,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703916270] [2024-06-28 03:01:30,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:01:30,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:01:30,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:01:30,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:01:30,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:01:30,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:01:30,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 490 transitions, 5734 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:01:30,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:01:30,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:01:30,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:01:32,165 INFO L124 PetriNetUnfolderBase]: 4707/7106 cut-off events. [2024-06-28 03:01:32,165 INFO L125 PetriNetUnfolderBase]: For 1181802/1181814 co-relation queries the response was YES. [2024-06-28 03:01:32,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71950 conditions, 7106 events. 4707/7106 cut-off events. For 1181802/1181814 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 38966 event pairs, 1012 based on Foata normal form. 9/7107 useless extension candidates. Maximal degree in co-relation 71812. Up to 7039 conditions per place. [2024-06-28 03:01:32,269 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 464 selfloop transitions, 32 changer transitions 0/499 dead transitions. [2024-06-28 03:01:32,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 499 transitions, 6754 flow [2024-06-28 03:01:32,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:01:32,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:01:32,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-06-28 03:01:32,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35034013605442177 [2024-06-28 03:01:32,270 INFO L175 Difference]: Start difference. First operand has 306 places, 490 transitions, 5734 flow. Second operand 7 states and 103 transitions. [2024-06-28 03:01:32,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 499 transitions, 6754 flow [2024-06-28 03:01:33,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 499 transitions, 6503 flow, removed 109 selfloop flow, removed 3 redundant places. [2024-06-28 03:01:33,770 INFO L231 Difference]: Finished difference. Result has 310 places, 490 transitions, 5553 flow [2024-06-28 03:01:33,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5483, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5553, PETRI_PLACES=310, PETRI_TRANSITIONS=490} [2024-06-28 03:01:33,770 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-28 03:01:33,770 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 490 transitions, 5553 flow [2024-06-28 03:01:33,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:01:33,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:01:33,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:01:33,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 03:01:33,771 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:01:33,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:01:33,771 INFO L85 PathProgramCache]: Analyzing trace with hash -2105699506, now seen corresponding path program 6 times [2024-06-28 03:01:33,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:01:33,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682730769] [2024-06-28 03:01:33,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:01:33,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:01:33,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:01:37,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:01:37,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:01:37,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682730769] [2024-06-28 03:01:37,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682730769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:01:37,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:01:37,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 03:01:37,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266301264] [2024-06-28 03:01:37,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:01:37,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 03:01:37,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:01:37,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 03:01:37,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-28 03:01:37,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:01:37,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 490 transitions, 5553 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-28 03:01:37,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:01:37,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:01:37,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:01:39,706 INFO L124 PetriNetUnfolderBase]: 4782/7233 cut-off events. [2024-06-28 03:01:39,706 INFO L125 PetriNetUnfolderBase]: For 1278594/1278600 co-relation queries the response was YES. [2024-06-28 03:01:39,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73408 conditions, 7233 events. 4782/7233 cut-off events. For 1278594/1278600 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 39918 event pairs, 867 based on Foata normal form. 24/7237 useless extension candidates. Maximal degree in co-relation 73268. Up to 6690 conditions per place. [2024-06-28 03:01:39,805 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 427 selfloop transitions, 105 changer transitions 0/535 dead transitions. [2024-06-28 03:01:39,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 535 transitions, 6905 flow [2024-06-28 03:01:39,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:01:39,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:01:39,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-28 03:01:39,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-28 03:01:39,807 INFO L175 Difference]: Start difference. First operand has 310 places, 490 transitions, 5553 flow. Second operand 11 states and 180 transitions. [2024-06-28 03:01:39,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 535 transitions, 6905 flow [2024-06-28 03:01:41,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 535 transitions, 6821 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-28 03:01:41,375 INFO L231 Difference]: Finished difference. Result has 315 places, 491 transitions, 5776 flow [2024-06-28 03:01:41,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5469, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5776, PETRI_PLACES=315, PETRI_TRANSITIONS=491} [2024-06-28 03:01:41,375 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-28 03:01:41,375 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 491 transitions, 5776 flow [2024-06-28 03:01:41,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-28 03:01:41,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:01:41,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:01:41,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 03:01:41,376 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:01:41,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:01:41,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1939465726, now seen corresponding path program 7 times [2024-06-28 03:01:41,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:01:41,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294719787] [2024-06-28 03:01:41,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:01:41,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:01:41,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:01:45,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:01:45,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:01:45,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294719787] [2024-06-28 03:01:45,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294719787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:01:45,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:01:45,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 03:01:45,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452432836] [2024-06-28 03:01:45,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:01:45,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 03:01:45,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:01:45,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 03:01:45,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-28 03:01:45,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:01:45,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 491 transitions, 5776 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-28 03:01:45,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:01:45,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:01:45,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:01:47,926 INFO L124 PetriNetUnfolderBase]: 4857/7356 cut-off events. [2024-06-28 03:01:47,926 INFO L125 PetriNetUnfolderBase]: For 1324803/1324815 co-relation queries the response was YES. [2024-06-28 03:01:47,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75432 conditions, 7356 events. 4857/7356 cut-off events. For 1324803/1324815 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 40918 event pairs, 1027 based on Foata normal form. 28/7376 useless extension candidates. Maximal degree in co-relation 75291. Up to 7046 conditions per place. [2024-06-28 03:01:48,031 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 486 selfloop transitions, 47 changer transitions 0/536 dead transitions. [2024-06-28 03:01:48,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 536 transitions, 7142 flow [2024-06-28 03:01:48,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:01:48,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:01:48,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-28 03:01:48,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38311688311688313 [2024-06-28 03:01:48,033 INFO L175 Difference]: Start difference. First operand has 315 places, 491 transitions, 5776 flow. Second operand 11 states and 177 transitions. [2024-06-28 03:01:48,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 536 transitions, 7142 flow [2024-06-28 03:01:50,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 536 transitions, 6811 flow, removed 34 selfloop flow, removed 10 redundant places. [2024-06-28 03:01:50,082 INFO L231 Difference]: Finished difference. Result has 317 places, 494 transitions, 5668 flow [2024-06-28 03:01:50,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5445, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5668, PETRI_PLACES=317, PETRI_TRANSITIONS=494} [2024-06-28 03:01:50,083 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-28 03:01:50,083 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 494 transitions, 5668 flow [2024-06-28 03:01:50,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-28 03:01:50,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:01:50,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:01:50,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 03:01:50,084 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:01:50,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:01:50,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1969792672, now seen corresponding path program 8 times [2024-06-28 03:01:50,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:01:50,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049026217] [2024-06-28 03:01:50,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:01:50,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:01:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:01:54,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:01:54,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:01:54,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049026217] [2024-06-28 03:01:54,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049026217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:01:54,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:01:54,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 03:01:54,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126923042] [2024-06-28 03:01:54,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:01:54,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 03:01:54,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:01:54,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 03:01:54,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-28 03:01:54,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:01:54,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 494 transitions, 5668 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-28 03:01:54,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:01:54,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:01:54,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:01:56,590 INFO L124 PetriNetUnfolderBase]: 4949/7508 cut-off events. [2024-06-28 03:01:56,590 INFO L125 PetriNetUnfolderBase]: For 1353621/1353633 co-relation queries the response was YES. [2024-06-28 03:01:56,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76344 conditions, 7508 events. 4949/7508 cut-off events. For 1353621/1353633 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 42201 event pairs, 1022 based on Foata normal form. 28/7528 useless extension candidates. Maximal degree in co-relation 76201. Up to 6704 conditions per place. [2024-06-28 03:01:56,701 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 424 selfloop transitions, 114 changer transitions 0/541 dead transitions. [2024-06-28 03:01:56,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 541 transitions, 7066 flow [2024-06-28 03:01:56,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:01:56,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:01:56,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-28 03:01:56,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 03:01:56,703 INFO L175 Difference]: Start difference. First operand has 317 places, 494 transitions, 5668 flow. Second operand 11 states and 187 transitions. [2024-06-28 03:01:56,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 541 transitions, 7066 flow [2024-06-28 03:01:58,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 541 transitions, 6901 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-28 03:01:58,806 INFO L231 Difference]: Finished difference. Result has 319 places, 497 transitions, 5869 flow [2024-06-28 03:01:58,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5503, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5869, PETRI_PLACES=319, PETRI_TRANSITIONS=497} [2024-06-28 03:01:58,807 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-28 03:01:58,807 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 497 transitions, 5869 flow [2024-06-28 03:01:58,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-28 03:01:58,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:01:58,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:01:58,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 03:01:58,808 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:01:58,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:01:58,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1620435890, now seen corresponding path program 9 times [2024-06-28 03:01:58,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:01:58,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020309310] [2024-06-28 03:01:58,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:01:58,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:01:58,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:02:01,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:02:01,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:02:01,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020309310] [2024-06-28 03:02:01,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020309310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:02:01,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:02:01,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:02:01,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795990894] [2024-06-28 03:02:01,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:02:01,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:02:01,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:02:01,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:02:01,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:02:01,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:02:01,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 497 transitions, 5869 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:02:01,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:02:01,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:02:01,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:02:03,733 INFO L124 PetriNetUnfolderBase]: 5135/7814 cut-off events. [2024-06-28 03:02:03,734 INFO L125 PetriNetUnfolderBase]: For 1455545/1455557 co-relation queries the response was YES. [2024-06-28 03:02:03,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81306 conditions, 7814 events. 5135/7814 cut-off events. For 1455545/1455557 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 44403 event pairs, 1085 based on Foata normal form. 24/7830 useless extension candidates. Maximal degree in co-relation 81162. Up to 7025 conditions per place. [2024-06-28 03:02:03,847 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 485 selfloop transitions, 56 changer transitions 0/544 dead transitions. [2024-06-28 03:02:03,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 544 transitions, 7707 flow [2024-06-28 03:02:03,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:02:03,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:02:03,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-28 03:02:03,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-28 03:02:03,849 INFO L175 Difference]: Start difference. First operand has 319 places, 497 transitions, 5869 flow. Second operand 10 states and 169 transitions. [2024-06-28 03:02:03,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 544 transitions, 7707 flow [2024-06-28 03:02:06,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 544 transitions, 7415 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-28 03:02:06,303 INFO L231 Difference]: Finished difference. Result has 321 places, 500 transitions, 5923 flow [2024-06-28 03:02:06,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5577, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5923, PETRI_PLACES=321, PETRI_TRANSITIONS=500} [2024-06-28 03:02:06,304 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-28 03:02:06,304 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 500 transitions, 5923 flow [2024-06-28 03:02:06,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:02:06,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:02:06,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:02:06,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 03:02:06,305 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:02:06,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:02:06,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1933209616, now seen corresponding path program 10 times [2024-06-28 03:02:06,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:02:06,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960735568] [2024-06-28 03:02:06,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:02:06,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:02:06,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:02:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:02:09,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:02:09,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960735568] [2024-06-28 03:02:09,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960735568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:02:09,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:02:09,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 03:02:09,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714687899] [2024-06-28 03:02:09,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:02:09,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 03:02:09,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:02:09,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 03:02:09,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-28 03:02:10,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:02:10,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 500 transitions, 5923 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-28 03:02:10,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:02:10,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:02:10,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:02:12,632 INFO L124 PetriNetUnfolderBase]: 5177/7888 cut-off events. [2024-06-28 03:02:12,632 INFO L125 PetriNetUnfolderBase]: For 1465463/1465475 co-relation queries the response was YES. [2024-06-28 03:02:12,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80776 conditions, 7888 events. 5177/7888 cut-off events. For 1465463/1465475 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 45083 event pairs, 1121 based on Foata normal form. 28/7908 useless extension candidates. Maximal degree in co-relation 80630. Up to 7560 conditions per place. [2024-06-28 03:02:12,757 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 494 selfloop transitions, 49 changer transitions 0/546 dead transitions. [2024-06-28 03:02:12,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 546 transitions, 7335 flow [2024-06-28 03:02:12,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:02:12,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:02:12,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-28 03:02:12,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3874458874458874 [2024-06-28 03:02:12,759 INFO L175 Difference]: Start difference. First operand has 321 places, 500 transitions, 5923 flow. Second operand 11 states and 179 transitions. [2024-06-28 03:02:12,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 546 transitions, 7335 flow [2024-06-28 03:02:15,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 546 transitions, 7194 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-28 03:02:15,413 INFO L231 Difference]: Finished difference. Result has 326 places, 503 transitions, 6026 flow [2024-06-28 03:02:15,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5784, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6026, PETRI_PLACES=326, PETRI_TRANSITIONS=503} [2024-06-28 03:02:15,414 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-28 03:02:15,414 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 503 transitions, 6026 flow [2024-06-28 03:02:15,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-28 03:02:15,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:02:15,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:02:15,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 03:02:15,415 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:02:15,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:02:15,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1963536562, now seen corresponding path program 11 times [2024-06-28 03:02:15,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:02:15,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434544373] [2024-06-28 03:02:15,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:02:15,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:02:15,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:02:18,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:02:18,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:02:18,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434544373] [2024-06-28 03:02:18,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434544373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:02:18,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:02:18,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 03:02:18,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660651167] [2024-06-28 03:02:18,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:02:18,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 03:02:18,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:02:18,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 03:02:18,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-28 03:02:18,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:02:18,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 503 transitions, 6026 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-28 03:02:18,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:02:18,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:02:18,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:02:21,233 INFO L124 PetriNetUnfolderBase]: 5344/8165 cut-off events. [2024-06-28 03:02:21,233 INFO L125 PetriNetUnfolderBase]: For 1500211/1500223 co-relation queries the response was YES. [2024-06-28 03:02:21,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82948 conditions, 8165 events. 5344/8165 cut-off events. For 1500211/1500223 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 47429 event pairs, 1121 based on Foata normal form. 28/8185 useless extension candidates. Maximal degree in co-relation 82800. Up to 7231 conditions per place. [2024-06-28 03:02:21,360 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 439 selfloop transitions, 108 changer transitions 0/550 dead transitions. [2024-06-28 03:02:21,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 550 transitions, 7450 flow [2024-06-28 03:02:21,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:02:21,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:02:21,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-28 03:02:21,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069264069264069 [2024-06-28 03:02:21,362 INFO L175 Difference]: Start difference. First operand has 326 places, 503 transitions, 6026 flow. Second operand 11 states and 188 transitions. [2024-06-28 03:02:21,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 550 transitions, 7450 flow [2024-06-28 03:02:23,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 550 transitions, 7300 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-28 03:02:23,874 INFO L231 Difference]: Finished difference. Result has 330 places, 505 transitions, 6226 flow [2024-06-28 03:02:23,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5876, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6226, PETRI_PLACES=330, PETRI_TRANSITIONS=505} [2024-06-28 03:02:23,875 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-28 03:02:23,875 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 505 transitions, 6226 flow [2024-06-28 03:02:23,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-28 03:02:23,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:02:23,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:02:23,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 03:02:23,875 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:02:23,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:02:23,876 INFO L85 PathProgramCache]: Analyzing trace with hash 101970076, now seen corresponding path program 12 times [2024-06-28 03:02:23,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:02:23,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437540814] [2024-06-28 03:02:23,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:02:23,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:02:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:02:26,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:02:26,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:02:26,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437540814] [2024-06-28 03:02:26,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437540814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:02:26,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:02:26,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 03:02:26,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546755719] [2024-06-28 03:02:26,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:02:26,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 03:02:26,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:02:26,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 03:02:26,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-28 03:02:26,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:02:26,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 505 transitions, 6226 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-28 03:02:26,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:02:26,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:02:26,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:02:29,441 INFO L124 PetriNetUnfolderBase]: 5463/8366 cut-off events. [2024-06-28 03:02:29,441 INFO L125 PetriNetUnfolderBase]: For 1570051/1570063 co-relation queries the response was YES. [2024-06-28 03:02:29,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86307 conditions, 8366 events. 5463/8366 cut-off events. For 1570051/1570063 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 48941 event pairs, 1150 based on Foata normal form. 24/8382 useless extension candidates. Maximal degree in co-relation 86158. Up to 7089 conditions per place. [2024-06-28 03:02:29,557 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 438 selfloop transitions, 111 changer transitions 0/552 dead transitions. [2024-06-28 03:02:29,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 552 transitions, 8084 flow [2024-06-28 03:02:29,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:02:29,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:02:29,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-28 03:02:29,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-28 03:02:29,559 INFO L175 Difference]: Start difference. First operand has 330 places, 505 transitions, 6226 flow. Second operand 10 states and 176 transitions. [2024-06-28 03:02:29,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 552 transitions, 8084 flow [2024-06-28 03:02:32,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 552 transitions, 7802 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-06-28 03:02:32,139 INFO L231 Difference]: Finished difference. Result has 331 places, 507 transitions, 6370 flow [2024-06-28 03:02:32,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5944, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6370, PETRI_PLACES=331, PETRI_TRANSITIONS=507} [2024-06-28 03:02:32,140 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-28 03:02:32,140 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 507 transitions, 6370 flow [2024-06-28 03:02:32,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-28 03:02:32,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:02:32,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:02:32,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 03:02:32,141 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:02:32,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:02:32,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1978350832, now seen corresponding path program 13 times [2024-06-28 03:02:32,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:02:32,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763772322] [2024-06-28 03:02:32,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:02:32,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:02:32,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:02:34,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:02:34,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:02:34,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763772322] [2024-06-28 03:02:34,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763772322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:02:34,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:02:34,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:02:34,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171505562] [2024-06-28 03:02:34,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:02:34,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:02:34,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:02:34,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:02:34,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:02:34,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:02:34,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 507 transitions, 6370 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:02:34,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:02:34,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:02:34,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:02:37,205 INFO L124 PetriNetUnfolderBase]: 5649/8672 cut-off events. [2024-06-28 03:02:37,205 INFO L125 PetriNetUnfolderBase]: For 1697134/1697146 co-relation queries the response was YES. [2024-06-28 03:02:37,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91172 conditions, 8672 events. 5649/8672 cut-off events. For 1697134/1697146 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 51451 event pairs, 1188 based on Foata normal form. 24/8688 useless extension candidates. Maximal degree in co-relation 91022. Up to 7554 conditions per place. [2024-06-28 03:02:37,342 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 438 selfloop transitions, 114 changer transitions 0/555 dead transitions. [2024-06-28 03:02:37,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 555 transitions, 8268 flow [2024-06-28 03:02:37,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:02:37,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:02:37,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-28 03:02:37,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-28 03:02:37,344 INFO L175 Difference]: Start difference. First operand has 331 places, 507 transitions, 6370 flow. Second operand 10 states and 174 transitions. [2024-06-28 03:02:37,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 555 transitions, 8268 flow [2024-06-28 03:02:39,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 555 transitions, 8064 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-28 03:02:40,006 INFO L231 Difference]: Finished difference. Result has 336 places, 510 transitions, 6643 flow [2024-06-28 03:02:40,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6166, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6643, PETRI_PLACES=336, PETRI_TRANSITIONS=510} [2024-06-28 03:02:40,009 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-28 03:02:40,009 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 510 transitions, 6643 flow [2024-06-28 03:02:40,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:02:40,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:02:40,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:02:40,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-28 03:02:40,010 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:02:40,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:02:40,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1988470162, now seen corresponding path program 14 times [2024-06-28 03:02:40,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:02:40,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983739231] [2024-06-28 03:02:40,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:02:40,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:02:40,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:02:42,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:02:42,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:02:42,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983739231] [2024-06-28 03:02:42,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983739231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:02:42,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:02:42,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:02:42,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679401409] [2024-06-28 03:02:42,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:02:42,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:02:42,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:02:42,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:02:42,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:02:42,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:02:42,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 510 transitions, 6643 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:02:42,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:02:42,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:02:42,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:02:44,648 INFO L124 PetriNetUnfolderBase]: 5682/8731 cut-off events. [2024-06-28 03:02:44,649 INFO L125 PetriNetUnfolderBase]: For 1711004/1711016 co-relation queries the response was YES. [2024-06-28 03:02:44,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91902 conditions, 8731 events. 5682/8731 cut-off events. For 1711004/1711016 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 51630 event pairs, 1115 based on Foata normal form. 24/8747 useless extension candidates. Maximal degree in co-relation 91749. Up to 5647 conditions per place. [2024-06-28 03:02:44,781 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 419 selfloop transitions, 136 changer transitions 0/558 dead transitions. [2024-06-28 03:02:44,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 558 transitions, 8445 flow [2024-06-28 03:02:44,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:02:44,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:02:44,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-28 03:02:44,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-28 03:02:44,783 INFO L175 Difference]: Start difference. First operand has 336 places, 510 transitions, 6643 flow. Second operand 10 states and 172 transitions. [2024-06-28 03:02:44,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 558 transitions, 8445 flow [2024-06-28 03:02:47,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 558 transitions, 8229 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-28 03:02:47,415 INFO L231 Difference]: Finished difference. Result has 340 places, 511 transitions, 6809 flow [2024-06-28 03:02:47,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6427, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6809, PETRI_PLACES=340, PETRI_TRANSITIONS=511} [2024-06-28 03:02:47,416 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-28 03:02:47,416 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 511 transitions, 6809 flow [2024-06-28 03:02:47,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:02:47,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:02:47,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:02:47,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-28 03:02:47,417 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:02:47,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:02:47,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1693011952, now seen corresponding path program 15 times [2024-06-28 03:02:47,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:02:47,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944015272] [2024-06-28 03:02:47,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:02:47,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:02:47,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:02:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:02:50,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:02:50,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944015272] [2024-06-28 03:02:50,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944015272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:02:50,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:02:50,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 03:02:50,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582537186] [2024-06-28 03:02:50,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:02:50,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 03:02:50,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:02:50,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 03:02:50,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-28 03:02:50,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:02:50,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 511 transitions, 6809 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-28 03:02:50,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:02:50,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:02:50,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:02:53,683 INFO L124 PetriNetUnfolderBase]: 5707/8778 cut-off events. [2024-06-28 03:02:53,684 INFO L125 PetriNetUnfolderBase]: For 1725946/1725958 co-relation queries the response was YES. [2024-06-28 03:02:53,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92135 conditions, 8778 events. 5707/8778 cut-off events. For 1725946/1725958 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 52407 event pairs, 1222 based on Foata normal form. 28/8798 useless extension candidates. Maximal degree in co-relation 91980. Up to 7854 conditions per place. [2024-06-28 03:02:53,814 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 439 selfloop transitions, 114 changer transitions 0/556 dead transitions. [2024-06-28 03:02:53,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 556 transitions, 8220 flow [2024-06-28 03:02:53,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:02:53,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:02:53,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-28 03:02:53,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39826839826839827 [2024-06-28 03:02:53,816 INFO L175 Difference]: Start difference. First operand has 340 places, 511 transitions, 6809 flow. Second operand 11 states and 184 transitions. [2024-06-28 03:02:53,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 556 transitions, 8220 flow [2024-06-28 03:02:56,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 556 transitions, 7862 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-28 03:02:56,891 INFO L231 Difference]: Finished difference. Result has 343 places, 513 transitions, 6803 flow [2024-06-28 03:02:56,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6453, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6803, PETRI_PLACES=343, PETRI_TRANSITIONS=513} [2024-06-28 03:02:56,892 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-28 03:02:56,896 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 513 transitions, 6803 flow [2024-06-28 03:02:56,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-28 03:02:56,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:02:56,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:02:56,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-28 03:02:56,896 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:02:56,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:02:56,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1851642194, now seen corresponding path program 4 times [2024-06-28 03:02:56,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:02:56,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305729455] [2024-06-28 03:02:56,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:02:56,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:02:56,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:02:59,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:02:59,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:02:59,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305729455] [2024-06-28 03:02:59,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305729455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:02:59,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:02:59,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:02:59,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743061714] [2024-06-28 03:02:59,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:02:59,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:02:59,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:02:59,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:02:59,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:02:59,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:02:59,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 513 transitions, 6803 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:02:59,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:02:59,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:02:59,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:03:01,593 INFO L124 PetriNetUnfolderBase]: 5717/8794 cut-off events. [2024-06-28 03:03:01,594 INFO L125 PetriNetUnfolderBase]: For 1665551/1665557 co-relation queries the response was YES. [2024-06-28 03:03:01,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91648 conditions, 8794 events. 5717/8794 cut-off events. For 1665551/1665557 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 52382 event pairs, 1272 based on Foata normal form. 6/8780 useless extension candidates. Maximal degree in co-relation 91492. Up to 8503 conditions per place. [2024-06-28 03:03:01,728 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 433 selfloop transitions, 97 changer transitions 0/533 dead transitions. [2024-06-28 03:03:01,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 533 transitions, 8273 flow [2024-06-28 03:03:01,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:03:01,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:03:01,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-28 03:03:01,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-28 03:03:01,730 INFO L175 Difference]: Start difference. First operand has 343 places, 513 transitions, 6803 flow. Second operand 8 states and 123 transitions. [2024-06-28 03:03:01,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 533 transitions, 8273 flow [2024-06-28 03:03:05,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 533 transitions, 7974 flow, removed 39 selfloop flow, removed 9 redundant places. [2024-06-28 03:03:05,058 INFO L231 Difference]: Finished difference. Result has 342 places, 519 transitions, 6870 flow [2024-06-28 03:03:05,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6504, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6870, PETRI_PLACES=342, PETRI_TRANSITIONS=519} [2024-06-28 03:03:05,059 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-28 03:03:05,059 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 519 transitions, 6870 flow [2024-06-28 03:03:05,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:03:05,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:03:05,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:03:05,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-28 03:03:05,060 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:03:05,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:03:05,060 INFO L85 PathProgramCache]: Analyzing trace with hash -867296924, now seen corresponding path program 2 times [2024-06-28 03:03:05,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:03:05,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791652585] [2024-06-28 03:03:05,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:03:05,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:03:05,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:03:07,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:03:07,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:03:07,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791652585] [2024-06-28 03:03:07,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791652585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:03:07,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:03:07,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:03:07,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907305162] [2024-06-28 03:03:07,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:03:07,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:03:07,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:03:07,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:03:07,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:03:07,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:03:07,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 519 transitions, 6870 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:03:07,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:03:07,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:03:07,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:03:09,597 INFO L124 PetriNetUnfolderBase]: 5730/8810 cut-off events. [2024-06-28 03:03:09,598 INFO L125 PetriNetUnfolderBase]: For 1678842/1678854 co-relation queries the response was YES. [2024-06-28 03:03:10,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91764 conditions, 8810 events. 5730/8810 cut-off events. For 1678842/1678854 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 52504 event pairs, 1328 based on Foata normal form. 9/8811 useless extension candidates. Maximal degree in co-relation 91607. Up to 8713 conditions per place. [2024-06-28 03:03:10,070 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 488 selfloop transitions, 51 changer transitions 0/542 dead transitions. [2024-06-28 03:03:10,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 542 transitions, 8688 flow [2024-06-28 03:03:10,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:03:10,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:03:10,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-28 03:03:10,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-28 03:03:10,071 INFO L175 Difference]: Start difference. First operand has 342 places, 519 transitions, 6870 flow. Second operand 8 states and 119 transitions. [2024-06-28 03:03:10,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 542 transitions, 8688 flow [2024-06-28 03:03:12,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 542 transitions, 8511 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-28 03:03:12,581 INFO L231 Difference]: Finished difference. Result has 347 places, 530 transitions, 7120 flow [2024-06-28 03:03:12,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6693, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7120, PETRI_PLACES=347, PETRI_TRANSITIONS=530} [2024-06-28 03:03:12,582 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-28 03:03:12,582 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 530 transitions, 7120 flow [2024-06-28 03:03:12,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:03:12,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:03:12,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:03:12,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-28 03:03:12,582 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:03:12,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:03:12,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1851166530, now seen corresponding path program 3 times [2024-06-28 03:03:12,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:03:12,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749127880] [2024-06-28 03:03:12,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:03:12,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:03:12,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:03:14,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:03:14,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:03:14,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749127880] [2024-06-28 03:03:14,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749127880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:03:14,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:03:14,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:03:14,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666025148] [2024-06-28 03:03:14,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:03:14,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:03:14,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:03:14,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:03:14,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:03:14,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:03:14,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 530 transitions, 7120 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:03:14,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:03:14,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:03:14,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:03:17,192 INFO L124 PetriNetUnfolderBase]: 5732/8816 cut-off events. [2024-06-28 03:03:17,192 INFO L125 PetriNetUnfolderBase]: For 1707537/1707537 co-relation queries the response was YES. [2024-06-28 03:03:17,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92182 conditions, 8816 events. 5732/8816 cut-off events. For 1707537/1707537 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 52568 event pairs, 1403 based on Foata normal form. 2/8815 useless extension candidates. Maximal degree in co-relation 92022. Up to 8766 conditions per place. [2024-06-28 03:03:17,329 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 518 selfloop transitions, 22 changer transitions 0/543 dead transitions. [2024-06-28 03:03:17,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 543 transitions, 8332 flow [2024-06-28 03:03:17,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:03:17,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:03:17,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2024-06-28 03:03:17,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3392857142857143 [2024-06-28 03:03:17,330 INFO L175 Difference]: Start difference. First operand has 347 places, 530 transitions, 7120 flow. Second operand 8 states and 114 transitions. [2024-06-28 03:03:17,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 543 transitions, 8332 flow [2024-06-28 03:03:20,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 543 transitions, 8123 flow, removed 88 selfloop flow, removed 3 redundant places. [2024-06-28 03:03:20,211 INFO L231 Difference]: Finished difference. Result has 352 places, 533 transitions, 7072 flow [2024-06-28 03:03:20,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6911, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7072, PETRI_PLACES=352, PETRI_TRANSITIONS=533} [2024-06-28 03:03:20,211 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-28 03:03:20,212 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 533 transitions, 7072 flow [2024-06-28 03:03:20,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:03:20,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:03:20,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:03:20,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-28 03:03:20,212 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:03:20,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:03:20,213 INFO L85 PathProgramCache]: Analyzing trace with hash -881119018, now seen corresponding path program 5 times [2024-06-28 03:03:20,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:03:20,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096907803] [2024-06-28 03:03:20,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:03:20,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:03:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:03:22,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:03:22,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:03:22,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096907803] [2024-06-28 03:03:22,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096907803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:03:22,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:03:22,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:03:22,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038147450] [2024-06-28 03:03:22,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:03:22,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:03:22,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:03:22,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:03:22,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:03:22,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:03:22,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 533 transitions, 7072 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:03:22,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:03:22,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:03:22,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:03:24,788 INFO L124 PetriNetUnfolderBase]: 5742/8829 cut-off events. [2024-06-28 03:03:24,789 INFO L125 PetriNetUnfolderBase]: For 1733480/1733486 co-relation queries the response was YES. [2024-06-28 03:03:24,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92788 conditions, 8829 events. 5742/8829 cut-off events. For 1733480/1733486 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 52588 event pairs, 1267 based on Foata normal form. 6/8815 useless extension candidates. Maximal degree in co-relation 92626. Up to 8603 conditions per place. [2024-06-28 03:03:24,925 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 467 selfloop transitions, 80 changer transitions 0/550 dead transitions. [2024-06-28 03:03:24,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 550 transitions, 8291 flow [2024-06-28 03:03:24,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:03:24,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:03:24,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2024-06-28 03:03:24,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34656084656084657 [2024-06-28 03:03:24,927 INFO L175 Difference]: Start difference. First operand has 352 places, 533 transitions, 7072 flow. Second operand 9 states and 131 transitions. [2024-06-28 03:03:24,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 550 transitions, 8291 flow [2024-06-28 03:03:27,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 550 transitions, 8118 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-28 03:03:27,497 INFO L231 Difference]: Finished difference. Result has 354 places, 536 transitions, 7149 flow [2024-06-28 03:03:27,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6899, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7149, PETRI_PLACES=354, PETRI_TRANSITIONS=536} [2024-06-28 03:03:27,498 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-28 03:03:27,498 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 536 transitions, 7149 flow [2024-06-28 03:03:27,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:03:27,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:03:27,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:03:27,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-28 03:03:27,498 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:03:27,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:03:27,499 INFO L85 PathProgramCache]: Analyzing trace with hash -881106494, now seen corresponding path program 4 times [2024-06-28 03:03:27,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:03:27,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650506259] [2024-06-28 03:03:27,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:03:27,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:03:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:03:29,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:03:29,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:03:29,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650506259] [2024-06-28 03:03:29,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650506259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:03:29,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:03:29,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:03:29,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590107675] [2024-06-28 03:03:29,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:03:29,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:03:29,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:03:29,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:03:29,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:03:29,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:03:29,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 536 transitions, 7149 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:03:29,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:03:29,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:03:29,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:03:31,913 INFO L124 PetriNetUnfolderBase]: 5739/8823 cut-off events. [2024-06-28 03:03:31,913 INFO L125 PetriNetUnfolderBase]: For 1749260/1749272 co-relation queries the response was YES. [2024-06-28 03:03:32,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92976 conditions, 8823 events. 5739/8823 cut-off events. For 1749260/1749272 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 52574 event pairs, 1328 based on Foata normal form. 9/8824 useless extension candidates. Maximal degree in co-relation 92814. Up to 8753 conditions per place. [2024-06-28 03:03:32,046 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 509 selfloop transitions, 35 changer transitions 0/547 dead transitions. [2024-06-28 03:03:32,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 547 transitions, 8276 flow [2024-06-28 03:03:32,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:03:32,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:03:32,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2024-06-28 03:03:32,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3392857142857143 [2024-06-28 03:03:32,048 INFO L175 Difference]: Start difference. First operand has 354 places, 536 transitions, 7149 flow. Second operand 8 states and 114 transitions. [2024-06-28 03:03:32,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 547 transitions, 8276 flow [2024-06-28 03:03:35,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 547 transitions, 7988 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-28 03:03:35,281 INFO L231 Difference]: Finished difference. Result has 355 places, 537 transitions, 6948 flow [2024-06-28 03:03:35,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6863, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6948, PETRI_PLACES=355, PETRI_TRANSITIONS=537} [2024-06-28 03:03:35,282 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-28 03:03:35,282 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 537 transitions, 6948 flow [2024-06-28 03:03:35,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:03:35,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:03:35,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:03:35,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-28 03:03:35,283 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:03:35,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:03:35,283 INFO L85 PathProgramCache]: Analyzing trace with hash -881106928, now seen corresponding path program 6 times [2024-06-28 03:03:35,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:03:35,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847816517] [2024-06-28 03:03:35,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:03:35,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:03:35,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:03:37,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:03:37,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:03:37,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847816517] [2024-06-28 03:03:37,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847816517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:03:37,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:03:37,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:03:37,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751662440] [2024-06-28 03:03:37,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:03:37,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:03:37,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:03:37,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:03:37,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:03:37,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:03:37,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 537 transitions, 6948 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:03:37,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:03:37,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:03:37,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:03:39,804 INFO L124 PetriNetUnfolderBase]: 5733/8817 cut-off events. [2024-06-28 03:03:39,804 INFO L125 PetriNetUnfolderBase]: For 1756560/1756566 co-relation queries the response was YES. [2024-06-28 03:03:39,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92634 conditions, 8817 events. 5733/8817 cut-off events. For 1756560/1756566 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 52441 event pairs, 1265 based on Foata normal form. 6/8803 useless extension candidates. Maximal degree in co-relation 92471. Up to 8582 conditions per place. [2024-06-28 03:03:39,957 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 464 selfloop transitions, 85 changer transitions 0/552 dead transitions. [2024-06-28 03:03:39,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 552 transitions, 8097 flow [2024-06-28 03:03:39,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:03:39,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:03:39,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-28 03:03:39,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3544973544973545 [2024-06-28 03:03:39,959 INFO L175 Difference]: Start difference. First operand has 355 places, 537 transitions, 6948 flow. Second operand 9 states and 134 transitions. [2024-06-28 03:03:39,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 552 transitions, 8097 flow [2024-06-28 03:03:43,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 552 transitions, 7977 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-28 03:03:43,480 INFO L231 Difference]: Finished difference. Result has 358 places, 537 transitions, 7004 flow [2024-06-28 03:03:43,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6828, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7004, PETRI_PLACES=358, PETRI_TRANSITIONS=537} [2024-06-28 03:03:43,480 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-28 03:03:43,480 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 537 transitions, 7004 flow [2024-06-28 03:03:43,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:03:43,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:03:43,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:03:43,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-28 03:03:43,481 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:03:43,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:03:43,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1303522786, now seen corresponding path program 1 times [2024-06-28 03:03:43,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:03:43,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470521179] [2024-06-28 03:03:43,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:03:43,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:03:43,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:03:45,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:03:45,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:03:45,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470521179] [2024-06-28 03:03:45,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470521179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:03:45,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:03:45,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:03:45,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492084336] [2024-06-28 03:03:45,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:03:45,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:03:45,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:03:45,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:03:45,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:03:45,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:03:45,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 537 transitions, 7004 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:03:45,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:03:45,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:03:45,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:03:47,924 INFO L124 PetriNetUnfolderBase]: 5562/8646 cut-off events. [2024-06-28 03:03:47,924 INFO L125 PetriNetUnfolderBase]: For 1769877/1769877 co-relation queries the response was YES. [2024-06-28 03:03:48,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91526 conditions, 8646 events. 5562/8646 cut-off events. For 1769877/1769877 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 52301 event pairs, 1359 based on Foata normal form. 1/8644 useless extension candidates. Maximal degree in co-relation 91362. Up to 8443 conditions per place. [2024-06-28 03:03:48,065 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 527 selfloop transitions, 18 changer transitions 0/559 dead transitions. [2024-06-28 03:03:48,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 559 transitions, 8280 flow [2024-06-28 03:03:48,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:03:48,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:03:48,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-28 03:03:48,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 03:03:48,066 INFO L175 Difference]: Start difference. First operand has 358 places, 537 transitions, 7004 flow. Second operand 8 states and 128 transitions. [2024-06-28 03:03:48,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 559 transitions, 8280 flow [2024-06-28 03:03:51,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 559 transitions, 8015 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-28 03:03:51,927 INFO L231 Difference]: Finished difference. Result has 357 places, 540 transitions, 6901 flow [2024-06-28 03:03:51,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6739, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6901, PETRI_PLACES=357, PETRI_TRANSITIONS=540} [2024-06-28 03:03:51,927 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-28 03:03:51,927 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 540 transitions, 6901 flow [2024-06-28 03:03:51,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:03:51,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:03:51,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:03:51,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-28 03:03:51,928 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:03:51,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:03:51,928 INFO L85 PathProgramCache]: Analyzing trace with hash -2087812346, now seen corresponding path program 1 times [2024-06-28 03:03:51,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:03:51,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191895149] [2024-06-28 03:03:51,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:03:51,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:03:51,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:03:54,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:03:54,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:03:54,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191895149] [2024-06-28 03:03:54,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191895149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:03:54,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:03:54,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:03:54,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497988104] [2024-06-28 03:03:54,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:03:54,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:03:54,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:03:54,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:03:54,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:03:54,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:03:54,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 540 transitions, 6901 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:03:54,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:03:54,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:03:54,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:03:56,487 INFO L124 PetriNetUnfolderBase]: 5597/8699 cut-off events. [2024-06-28 03:03:56,487 INFO L125 PetriNetUnfolderBase]: For 1846333/1846333 co-relation queries the response was YES. [2024-06-28 03:03:56,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92246 conditions, 8699 events. 5597/8699 cut-off events. For 1846333/1846333 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 52623 event pairs, 1358 based on Foata normal form. 9/8705 useless extension candidates. Maximal degree in co-relation 92082. Up to 8471 conditions per place. [2024-06-28 03:03:56,633 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 531 selfloop transitions, 19 changer transitions 0/564 dead transitions. [2024-06-28 03:03:56,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 564 transitions, 8253 flow [2024-06-28 03:03:56,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:03:56,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:03:56,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-28 03:03:56,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-28 03:03:56,634 INFO L175 Difference]: Start difference. First operand has 357 places, 540 transitions, 6901 flow. Second operand 8 states and 130 transitions. [2024-06-28 03:03:56,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 564 transitions, 8253 flow [2024-06-28 03:03:59,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 564 transitions, 8113 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-28 03:03:59,376 INFO L231 Difference]: Finished difference. Result has 359 places, 544 transitions, 6882 flow [2024-06-28 03:03:59,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6761, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6882, PETRI_PLACES=359, PETRI_TRANSITIONS=544} [2024-06-28 03:03:59,387 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-28 03:03:59,387 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 544 transitions, 6882 flow [2024-06-28 03:03:59,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:03:59,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:03:59,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:03:59,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-28 03:03:59,387 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:03:59,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:03:59,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1308284572, now seen corresponding path program 2 times [2024-06-28 03:03:59,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:03:59,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484507588] [2024-06-28 03:03:59,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:03:59,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:03:59,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:04:01,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:04:01,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:04:01,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484507588] [2024-06-28 03:04:01,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484507588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:04:01,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:04:01,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:04:01,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928740471] [2024-06-28 03:04:01,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:04:01,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:04:01,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:04:01,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:04:01,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:04:01,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:04:01,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 544 transitions, 6882 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:04:01,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:04:01,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:04:01,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:04:04,223 INFO L124 PetriNetUnfolderBase]: 5621/8733 cut-off events. [2024-06-28 03:04:04,223 INFO L125 PetriNetUnfolderBase]: For 1867662/1867667 co-relation queries the response was YES. [2024-06-28 03:04:04,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93671 conditions, 8733 events. 5621/8733 cut-off events. For 1867662/1867667 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 52859 event pairs, 1362 based on Foata normal form. 6/8736 useless extension candidates. Maximal degree in co-relation 93506. Up to 8524 conditions per place. [2024-06-28 03:04:04,347 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 530 selfloop transitions, 19 changer transitions 0/563 dead transitions. [2024-06-28 03:04:04,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 563 transitions, 8164 flow [2024-06-28 03:04:04,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:04:04,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:04:04,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-28 03:04:04,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-28 03:04:04,348 INFO L175 Difference]: Start difference. First operand has 359 places, 544 transitions, 6882 flow. Second operand 8 states and 125 transitions. [2024-06-28 03:04:04,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 563 transitions, 8164 flow [2024-06-28 03:04:07,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 563 transitions, 8079 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-28 03:04:07,198 INFO L231 Difference]: Finished difference. Result has 361 places, 548 transitions, 6966 flow [2024-06-28 03:04:07,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6797, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6966, PETRI_PLACES=361, PETRI_TRANSITIONS=548} [2024-06-28 03:04:07,198 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-28 03:04:07,198 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 548 transitions, 6966 flow [2024-06-28 03:04:07,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:04:07,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:04:07,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:04:07,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-28 03:04:07,199 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:04:07,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:04:07,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1308291082, now seen corresponding path program 3 times [2024-06-28 03:04:07,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:04:07,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137011382] [2024-06-28 03:04:07,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:04:07,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:04:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:04:09,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:04:09,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:04:09,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137011382] [2024-06-28 03:04:09,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137011382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:04:09,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:04:09,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:04:09,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638315834] [2024-06-28 03:04:09,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:04:09,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:04:09,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:04:09,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:04:09,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:04:09,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:04:09,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 548 transitions, 6966 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:04:09,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:04:09,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:04:09,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:04:11,773 INFO L124 PetriNetUnfolderBase]: 5622/8736 cut-off events. [2024-06-28 03:04:11,774 INFO L125 PetriNetUnfolderBase]: For 1865225/1865230 co-relation queries the response was YES. [2024-06-28 03:04:11,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94189 conditions, 8736 events. 5622/8736 cut-off events. For 1865225/1865230 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 52873 event pairs, 1361 based on Foata normal form. 7/8740 useless extension candidates. Maximal degree in co-relation 94023. Up to 8537 conditions per place. [2024-06-28 03:04:11,916 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 532 selfloop transitions, 18 changer transitions 0/564 dead transitions. [2024-06-28 03:04:11,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 564 transitions, 8172 flow [2024-06-28 03:04:11,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:04:11,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:04:11,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-28 03:04:11,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3630952380952381 [2024-06-28 03:04:11,917 INFO L175 Difference]: Start difference. First operand has 361 places, 548 transitions, 6966 flow. Second operand 8 states and 122 transitions. [2024-06-28 03:04:11,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 564 transitions, 8172 flow [2024-06-28 03:04:15,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 564 transitions, 8033 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-28 03:04:15,242 INFO L231 Difference]: Finished difference. Result has 363 places, 551 transitions, 6937 flow [2024-06-28 03:04:15,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6827, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6937, PETRI_PLACES=363, PETRI_TRANSITIONS=551} [2024-06-28 03:04:15,243 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-28 03:04:15,243 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 551 transitions, 6937 flow [2024-06-28 03:04:15,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:04:15,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:04:15,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:04:15,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-28 03:04:15,244 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:04:15,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:04:15,245 INFO L85 PathProgramCache]: Analyzing trace with hash -875393380, now seen corresponding path program 4 times [2024-06-28 03:04:15,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:04:15,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848825375] [2024-06-28 03:04:15,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:04:15,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:04:15,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:04:17,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:04:17,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:04:17,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848825375] [2024-06-28 03:04:17,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848825375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:04:17,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:04:17,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:04:17,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040118785] [2024-06-28 03:04:17,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:04:17,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:04:17,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:04:17,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:04:17,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:04:17,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:04:17,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 551 transitions, 6937 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:04:17,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:04:17,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:04:17,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:04:20,089 INFO L124 PetriNetUnfolderBase]: 5668/8804 cut-off events. [2024-06-28 03:04:20,090 INFO L125 PetriNetUnfolderBase]: For 1943881/1943907 co-relation queries the response was YES. [2024-06-28 03:04:20,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95627 conditions, 8804 events. 5668/8804 cut-off events. For 1943881/1943907 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 53394 event pairs, 1363 based on Foata normal form. 11/8811 useless extension candidates. Maximal degree in co-relation 95460. Up to 8580 conditions per place. [2024-06-28 03:04:20,221 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 537 selfloop transitions, 21 changer transitions 0/572 dead transitions. [2024-06-28 03:04:20,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 572 transitions, 8567 flow [2024-06-28 03:04:20,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:04:20,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:04:20,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-28 03:04:20,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-28 03:04:20,222 INFO L175 Difference]: Start difference. First operand has 363 places, 551 transitions, 6937 flow. Second operand 8 states and 125 transitions. [2024-06-28 03:04:20,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 572 transitions, 8567 flow [2024-06-28 03:04:23,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 572 transitions, 8479 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-28 03:04:23,333 INFO L231 Difference]: Finished difference. Result has 366 places, 558 transitions, 7087 flow [2024-06-28 03:04:23,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6849, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7087, PETRI_PLACES=366, PETRI_TRANSITIONS=558} [2024-06-28 03:04:23,334 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-28 03:04:23,334 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 558 transitions, 7087 flow [2024-06-28 03:04:23,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:04:23,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:04:23,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:04:23,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-28 03:04:23,334 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:04:23,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:04:23,335 INFO L85 PathProgramCache]: Analyzing trace with hash -875386870, now seen corresponding path program 5 times [2024-06-28 03:04:23,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:04:23,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856598278] [2024-06-28 03:04:23,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:04:23,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:04:23,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:04:25,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:04:25,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:04:25,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856598278] [2024-06-28 03:04:25,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856598278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:04:25,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:04:25,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:04:25,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612683371] [2024-06-28 03:04:25,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:04:25,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:04:25,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:04:25,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:04:25,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:04:25,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:04:25,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 558 transitions, 7087 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:04:25,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:04:25,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:04:25,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:04:27,968 INFO L124 PetriNetUnfolderBase]: 5672/8810 cut-off events. [2024-06-28 03:04:27,969 INFO L125 PetriNetUnfolderBase]: For 1929751/1929759 co-relation queries the response was YES. [2024-06-28 03:04:28,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96726 conditions, 8810 events. 5672/8810 cut-off events. For 1929751/1929759 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 53429 event pairs, 1362 based on Foata normal form. 1/8808 useless extension candidates. Maximal degree in co-relation 96557. Up to 8614 conditions per place. [2024-06-28 03:04:28,116 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 542 selfloop transitions, 18 changer transitions 0/574 dead transitions. [2024-06-28 03:04:28,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 574 transitions, 8331 flow [2024-06-28 03:04:28,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:04:28,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:04:28,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-28 03:04:28,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-28 03:04:28,117 INFO L175 Difference]: Start difference. First operand has 366 places, 558 transitions, 7087 flow. Second operand 8 states and 119 transitions. [2024-06-28 03:04:28,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 574 transitions, 8331 flow [2024-06-28 03:04:32,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 574 transitions, 8248 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-28 03:04:32,309 INFO L231 Difference]: Finished difference. Result has 371 places, 564 transitions, 7154 flow [2024-06-28 03:04:32,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7004, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7154, PETRI_PLACES=371, PETRI_TRANSITIONS=564} [2024-06-28 03:04:32,309 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-28 03:04:32,309 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 564 transitions, 7154 flow [2024-06-28 03:04:32,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:04:32,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:04:32,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:04:32,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-28 03:04:32,310 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:04:32,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:04:32,311 INFO L85 PathProgramCache]: Analyzing trace with hash -867112660, now seen corresponding path program 6 times [2024-06-28 03:04:32,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:04:32,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13429609] [2024-06-28 03:04:32,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:04:32,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:04:32,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:04:34,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:04:34,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:04:34,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13429609] [2024-06-28 03:04:34,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13429609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:04:34,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:04:34,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:04:34,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948043859] [2024-06-28 03:04:34,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:04:34,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:04:34,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:04:34,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:04:34,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:04:34,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:04:34,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 564 transitions, 7154 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:04:34,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:04:34,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:04:34,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:04:36,995 INFO L124 PetriNetUnfolderBase]: 5671/8809 cut-off events. [2024-06-28 03:04:36,995 INFO L125 PetriNetUnfolderBase]: For 1954318/1954318 co-relation queries the response was YES. [2024-06-28 03:04:37,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96970 conditions, 8809 events. 5671/8809 cut-off events. For 1954318/1954318 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 53408 event pairs, 1362 based on Foata normal form. 3/8809 useless extension candidates. Maximal degree in co-relation 96798. Up to 8600 conditions per place. [2024-06-28 03:04:37,154 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 545 selfloop transitions, 20 changer transitions 0/579 dead transitions. [2024-06-28 03:04:37,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 579 transitions, 8422 flow [2024-06-28 03:04:37,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:04:37,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:04:37,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-28 03:04:37,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-28 03:04:37,156 INFO L175 Difference]: Start difference. First operand has 371 places, 564 transitions, 7154 flow. Second operand 8 states and 121 transitions. [2024-06-28 03:04:37,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 579 transitions, 8422 flow [2024-06-28 03:04:40,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 579 transitions, 8329 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-28 03:04:41,001 INFO L231 Difference]: Finished difference. Result has 375 places, 567 transitions, 7197 flow [2024-06-28 03:04:41,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7061, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7197, PETRI_PLACES=375, PETRI_TRANSITIONS=567} [2024-06-28 03:04:41,002 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-28 03:04:41,002 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 567 transitions, 7197 flow [2024-06-28 03:04:41,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:04:41,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:04:41,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:04:41,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-28 03:04:41,003 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:04:41,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:04:41,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1851149666, now seen corresponding path program 1 times [2024-06-28 03:04:41,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:04:41,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700201791] [2024-06-28 03:04:41,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:04:41,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:04:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:04:44,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:04:44,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:04:44,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700201791] [2024-06-28 03:04:44,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700201791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:04:44,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:04:44,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:04:44,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847339462] [2024-06-28 03:04:44,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:04:44,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:04:44,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:04:44,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:04:44,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:04:44,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:04:44,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 567 transitions, 7197 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:04:44,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:04:44,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:04:44,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:04:46,992 INFO L124 PetriNetUnfolderBase]: 5878/9022 cut-off events. [2024-06-28 03:04:46,992 INFO L125 PetriNetUnfolderBase]: For 1978114/1978114 co-relation queries the response was YES. [2024-06-28 03:04:47,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99125 conditions, 9022 events. 5878/9022 cut-off events. For 1978114/1978114 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 53696 event pairs, 1413 based on Foata normal form. 2/9021 useless extension candidates. Maximal degree in co-relation 98951. Up to 8974 conditions per place. [2024-06-28 03:04:47,155 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 558 selfloop transitions, 20 changer transitions 0/581 dead transitions. [2024-06-28 03:04:47,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 581 transitions, 8475 flow [2024-06-28 03:04:47,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:04:47,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:04:47,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 123 transitions. [2024-06-28 03:04:47,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3253968253968254 [2024-06-28 03:04:47,156 INFO L175 Difference]: Start difference. First operand has 375 places, 567 transitions, 7197 flow. Second operand 9 states and 123 transitions. [2024-06-28 03:04:47,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 581 transitions, 8475 flow [2024-06-28 03:04:50,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 581 transitions, 8363 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-28 03:04:50,822 INFO L231 Difference]: Finished difference. Result has 378 places, 569 transitions, 7222 flow [2024-06-28 03:04:50,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7085, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7222, PETRI_PLACES=378, PETRI_TRANSITIONS=569} [2024-06-28 03:04:50,823 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-28 03:04:50,823 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 569 transitions, 7222 flow [2024-06-28 03:04:50,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:04:50,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:04:50,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:04:50,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-28 03:04:50,824 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:04:50,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:04:50,824 INFO L85 PathProgramCache]: Analyzing trace with hash -189734404, now seen corresponding path program 1 times [2024-06-28 03:04:50,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:04:50,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368143190] [2024-06-28 03:04:50,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:04:50,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:04:50,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:04:54,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:04:54,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:04:54,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368143190] [2024-06-28 03:04:54,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368143190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:04:54,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:04:54,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-28 03:04:54,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622345081] [2024-06-28 03:04:54,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:04:54,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-28 03:04:54,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:04:54,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-28 03:04:54,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-28 03:04:54,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:04:54,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 569 transitions, 7222 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:04:54,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:04:54,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:04:54,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:04:58,053 INFO L124 PetriNetUnfolderBase]: 5919/9092 cut-off events. [2024-06-28 03:04:58,053 INFO L125 PetriNetUnfolderBase]: For 2064737/2064741 co-relation queries the response was YES. [2024-06-28 03:04:58,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100203 conditions, 9092 events. 5919/9092 cut-off events. For 2064737/2064741 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 54013 event pairs, 1094 based on Foata normal form. 16/9105 useless extension candidates. Maximal degree in co-relation 100028. Up to 8760 conditions per place. [2024-06-28 03:04:58,196 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 554 selfloop transitions, 55 changer transitions 0/612 dead transitions. [2024-06-28 03:04:58,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 612 transitions, 8728 flow [2024-06-28 03:04:58,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:04:58,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:04:58,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-28 03:04:58,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-28 03:04:58,198 INFO L175 Difference]: Start difference. First operand has 378 places, 569 transitions, 7222 flow. Second operand 10 states and 162 transitions. [2024-06-28 03:04:58,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 612 transitions, 8728 flow [2024-06-28 03:05:02,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 612 transitions, 8599 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-28 03:05:02,909 INFO L231 Difference]: Finished difference. Result has 382 places, 572 transitions, 7351 flow [2024-06-28 03:05:02,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7093, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7351, PETRI_PLACES=382, PETRI_TRANSITIONS=572} [2024-06-28 03:05:02,909 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-28 03:05:02,910 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 572 transitions, 7351 flow [2024-06-28 03:05:02,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:05:02,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:05:02,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:05:02,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-28 03:05:02,910 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:05:02,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:05:02,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1614850616, now seen corresponding path program 2 times [2024-06-28 03:05:02,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:05:02,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756736300] [2024-06-28 03:05:02,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:05:02,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:05:02,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:05:06,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:05:06,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:05:06,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756736300] [2024-06-28 03:05:06,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756736300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:05:06,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:05:06,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-28 03:05:06,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578955099] [2024-06-28 03:05:06,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:05:06,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-28 03:05:06,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:05:06,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-28 03:05:06,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-28 03:05:06,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:05:06,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 572 transitions, 7351 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:05:06,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:05:06,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:05:06,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:05:09,810 INFO L124 PetriNetUnfolderBase]: 5977/9184 cut-off events. [2024-06-28 03:05:09,811 INFO L125 PetriNetUnfolderBase]: For 2103465/2103469 co-relation queries the response was YES. [2024-06-28 03:05:09,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101671 conditions, 9184 events. 5977/9184 cut-off events. For 2103465/2103469 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 55011 event pairs, 1171 based on Foata normal form. 16/9197 useless extension candidates. Maximal degree in co-relation 101494. Up to 8491 conditions per place. [2024-06-28 03:05:09,982 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 469 selfloop transitions, 148 changer transitions 0/620 dead transitions. [2024-06-28 03:05:09,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 620 transitions, 8877 flow [2024-06-28 03:05:09,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:05:09,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:05:09,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2024-06-28 03:05:09,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3852813852813853 [2024-06-28 03:05:09,984 INFO L175 Difference]: Start difference. First operand has 382 places, 572 transitions, 7351 flow. Second operand 11 states and 178 transitions. [2024-06-28 03:05:09,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 620 transitions, 8877 flow [2024-06-28 03:05:14,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 620 transitions, 8653 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-28 03:05:14,776 INFO L231 Difference]: Finished difference. Result has 387 places, 575 transitions, 7563 flow [2024-06-28 03:05:14,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7127, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7563, PETRI_PLACES=387, PETRI_TRANSITIONS=575} [2024-06-28 03:05:14,777 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-28 03:05:14,777 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 575 transitions, 7563 flow [2024-06-28 03:05:14,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:05:14,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:05:14,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:05:14,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-28 03:05:14,778 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:05:14,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:05:14,778 INFO L85 PathProgramCache]: Analyzing trace with hash -114190921, now seen corresponding path program 1 times [2024-06-28 03:05:14,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:05:14,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978096791] [2024-06-28 03:05:14,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:05:14,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:05:15,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:05:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:05:18,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:05:18,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978096791] [2024-06-28 03:05:18,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978096791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:05:18,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:05:18,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-28 03:05:18,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726962072] [2024-06-28 03:05:18,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:05:18,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-28 03:05:18,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:05:18,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-28 03:05:18,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-28 03:05:18,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:05:18,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 575 transitions, 7563 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:05:18,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:05:18,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:05:18,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:05:22,191 INFO L124 PetriNetUnfolderBase]: 6010/9243 cut-off events. [2024-06-28 03:05:22,192 INFO L125 PetriNetUnfolderBase]: For 2166605/2166609 co-relation queries the response was YES. [2024-06-28 03:05:22,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101966 conditions, 9243 events. 6010/9243 cut-off events. For 2166605/2166609 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 55423 event pairs, 1188 based on Foata normal form. 20/9260 useless extension candidates. Maximal degree in co-relation 101787. Up to 8318 conditions per place. [2024-06-28 03:05:22,325 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 472 selfloop transitions, 143 changer transitions 0/618 dead transitions. [2024-06-28 03:05:22,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 618 transitions, 9095 flow [2024-06-28 03:05:22,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:05:22,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:05:22,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-28 03:05:22,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-28 03:05:22,326 INFO L175 Difference]: Start difference. First operand has 387 places, 575 transitions, 7563 flow. Second operand 10 states and 168 transitions. [2024-06-28 03:05:22,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 618 transitions, 9095 flow [2024-06-28 03:05:26,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 618 transitions, 8717 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-28 03:05:26,266 INFO L231 Difference]: Finished difference. Result has 389 places, 576 transitions, 7605 flow [2024-06-28 03:05:26,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7185, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7605, PETRI_PLACES=389, PETRI_TRANSITIONS=576} [2024-06-28 03:05:26,267 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-28 03:05:26,267 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 576 transitions, 7605 flow [2024-06-28 03:05:26,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:05:26,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:05:26,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:05:26,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-28 03:05:26,268 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:05:26,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:05:26,268 INFO L85 PathProgramCache]: Analyzing trace with hash -117915788, now seen corresponding path program 3 times [2024-06-28 03:05:26,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:05:26,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030123835] [2024-06-28 03:05:26,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:05:26,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:05:26,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:05:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:05:29,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:05:29,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030123835] [2024-06-28 03:05:29,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030123835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:05:29,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:05:29,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-28 03:05:29,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691870690] [2024-06-28 03:05:29,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:05:29,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-28 03:05:29,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:05:29,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-28 03:05:29,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-28 03:05:30,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:05:30,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 576 transitions, 7605 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:05:30,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:05:30,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:05:30,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:05:33,430 INFO L124 PetriNetUnfolderBase]: 6051/9323 cut-off events. [2024-06-28 03:05:33,430 INFO L125 PetriNetUnfolderBase]: For 2181037/2181041 co-relation queries the response was YES. [2024-06-28 03:05:33,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102669 conditions, 9323 events. 6051/9323 cut-off events. For 2181037/2181041 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 56211 event pairs, 1211 based on Foata normal form. 16/9336 useless extension candidates. Maximal degree in co-relation 102489. Up to 8875 conditions per place. [2024-06-28 03:05:33,594 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 531 selfloop transitions, 90 changer transitions 0/624 dead transitions. [2024-06-28 03:05:33,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 624 transitions, 9163 flow [2024-06-28 03:05:33,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:05:33,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:05:33,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-28 03:05:33,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 03:05:33,596 INFO L175 Difference]: Start difference. First operand has 389 places, 576 transitions, 7605 flow. Second operand 11 states and 176 transitions. [2024-06-28 03:05:33,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 624 transitions, 9163 flow [2024-06-28 03:05:38,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 624 transitions, 8813 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-28 03:05:38,814 INFO L231 Difference]: Finished difference. Result has 393 places, 579 transitions, 7590 flow [2024-06-28 03:05:38,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7255, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7590, PETRI_PLACES=393, PETRI_TRANSITIONS=579} [2024-06-28 03:05:38,815 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-28 03:05:38,815 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 579 transitions, 7590 flow [2024-06-28 03:05:38,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:05:38,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:05:38,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:05:38,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-28 03:05:38,816 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:05:38,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:05:38,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1636706978, now seen corresponding path program 4 times [2024-06-28 03:05:38,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:05:38,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594742870] [2024-06-28 03:05:38,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:05:38,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:05:38,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:05:43,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:05:43,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:05:43,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594742870] [2024-06-28 03:05:43,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594742870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:05:43,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:05:43,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-28 03:05:43,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334055247] [2024-06-28 03:05:43,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:05:43,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-28 03:05:43,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:05:43,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-28 03:05:43,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-28 03:05:43,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:05:43,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 579 transitions, 7590 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:05:43,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:05:43,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:05:43,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:05:46,643 INFO L124 PetriNetUnfolderBase]: 6092/9385 cut-off events. [2024-06-28 03:05:46,643 INFO L125 PetriNetUnfolderBase]: For 2222750/2222754 co-relation queries the response was YES. [2024-06-28 03:05:46,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103209 conditions, 9385 events. 6092/9385 cut-off events. For 2222750/2222754 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 56588 event pairs, 1203 based on Foata normal form. 16/9398 useless extension candidates. Maximal degree in co-relation 103027. Up to 8238 conditions per place. [2024-06-28 03:05:46,807 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 482 selfloop transitions, 146 changer transitions 0/631 dead transitions. [2024-06-28 03:05:46,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 631 transitions, 9220 flow [2024-06-28 03:05:46,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:05:46,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:05:46,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-28 03:05:46,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39826839826839827 [2024-06-28 03:05:46,809 INFO L175 Difference]: Start difference. First operand has 393 places, 579 transitions, 7590 flow. Second operand 11 states and 184 transitions. [2024-06-28 03:05:46,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 631 transitions, 9220 flow [2024-06-28 03:05:51,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 631 transitions, 8916 flow, removed 64 selfloop flow, removed 8 redundant places. [2024-06-28 03:05:51,480 INFO L231 Difference]: Finished difference. Result has 397 places, 582 transitions, 7770 flow [2024-06-28 03:05:51,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7286, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7770, PETRI_PLACES=397, PETRI_TRANSITIONS=582} [2024-06-28 03:05:51,480 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-28 03:05:51,480 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 582 transitions, 7770 flow [2024-06-28 03:05:51,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:05:51,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:05:51,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:05:51,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-28 03:05:51,481 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:05:51,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:05:51,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1317205120, now seen corresponding path program 1 times [2024-06-28 03:05:51,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:05:51,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544104930] [2024-06-28 03:05:51,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:05:51,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:05:51,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:05:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:05:53,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:05:53,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544104930] [2024-06-28 03:05:53,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544104930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:05:53,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:05:53,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:05:53,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754777310] [2024-06-28 03:05:53,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:05:53,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:05:53,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:05:53,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:05:53,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:05:53,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:05:53,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 582 transitions, 7770 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:05:53,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:05:53,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:05:53,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:05:56,361 INFO L124 PetriNetUnfolderBase]: 6102/9406 cut-off events. [2024-06-28 03:05:56,362 INFO L125 PetriNetUnfolderBase]: For 2195593/2195597 co-relation queries the response was YES. [2024-06-28 03:05:56,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103510 conditions, 9406 events. 6102/9406 cut-off events. For 2195593/2195597 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 56892 event pairs, 1236 based on Foata normal form. 6/9409 useless extension candidates. Maximal degree in co-relation 103326. Up to 9150 conditions per place. [2024-06-28 03:05:56,535 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 541 selfloop transitions, 69 changer transitions 0/613 dead transitions. [2024-06-28 03:05:56,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 613 transitions, 9220 flow [2024-06-28 03:05:56,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:05:56,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:05:56,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-28 03:05:56,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-28 03:05:56,537 INFO L175 Difference]: Start difference. First operand has 397 places, 582 transitions, 7770 flow. Second operand 8 states and 130 transitions. [2024-06-28 03:05:56,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 613 transitions, 9220 flow [2024-06-28 03:06:02,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 613 transitions, 8833 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-06-28 03:06:02,208 INFO L231 Difference]: Finished difference. Result has 398 places, 585 transitions, 7650 flow [2024-06-28 03:06:02,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7383, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7650, PETRI_PLACES=398, PETRI_TRANSITIONS=585} [2024-06-28 03:06:02,209 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 355 predicate places. [2024-06-28 03:06:02,209 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 585 transitions, 7650 flow [2024-06-28 03:06:02,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:06:02,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:06:02,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:06:02,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-28 03:06:02,210 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:06:02,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:06:02,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1310538880, now seen corresponding path program 2 times [2024-06-28 03:06:02,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:06:02,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634840110] [2024-06-28 03:06:02,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:06:02,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:06:02,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:06:04,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:06:04,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:06:04,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634840110] [2024-06-28 03:06:04,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634840110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:06:04,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:06:04,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:06:04,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428497502] [2024-06-28 03:06:04,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:06:04,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:06:04,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:06:04,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:06:04,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:06:04,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:06:04,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 585 transitions, 7650 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:06:04,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:06:04,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:06:04,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:06:06,923 INFO L124 PetriNetUnfolderBase]: 6112/9417 cut-off events. [2024-06-28 03:06:06,923 INFO L125 PetriNetUnfolderBase]: For 2211850/2211854 co-relation queries the response was YES. [2024-06-28 03:06:07,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103583 conditions, 9417 events. 6112/9417 cut-off events. For 2211850/2211854 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 56910 event pairs, 1325 based on Foata normal form. 6/9420 useless extension candidates. Maximal degree in co-relation 103398. Up to 9251 conditions per place. [2024-06-28 03:06:07,084 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 558 selfloop transitions, 58 changer transitions 0/619 dead transitions. [2024-06-28 03:06:07,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 619 transitions, 9167 flow [2024-06-28 03:06:07,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:06:07,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:06:07,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-28 03:06:07,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-28 03:06:07,085 INFO L175 Difference]: Start difference. First operand has 398 places, 585 transitions, 7650 flow. Second operand 8 states and 126 transitions. [2024-06-28 03:06:07,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 619 transitions, 9167 flow [2024-06-28 03:06:13,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 619 transitions, 8932 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-28 03:06:13,038 INFO L231 Difference]: Finished difference. Result has 401 places, 595 transitions, 7757 flow [2024-06-28 03:06:13,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7415, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7757, PETRI_PLACES=401, PETRI_TRANSITIONS=595} [2024-06-28 03:06:13,039 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-28 03:06:13,039 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 595 transitions, 7757 flow [2024-06-28 03:06:13,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:06:13,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:06:13,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:06:13,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-28 03:06:13,039 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:06:13,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:06:13,040 INFO L85 PathProgramCache]: Analyzing trace with hash 680334456, now seen corresponding path program 3 times [2024-06-28 03:06:13,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:06:13,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737117486] [2024-06-28 03:06:13,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:06:13,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:06:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:06:15,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:06:15,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:06:15,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737117486] [2024-06-28 03:06:15,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737117486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:06:15,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:06:15,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:06:15,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078810394] [2024-06-28 03:06:15,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:06:15,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:06:15,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:06:15,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:06:15,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:06:15,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:06:15,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 595 transitions, 7757 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:06:15,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:06:15,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:06:15,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:06:17,860 INFO L124 PetriNetUnfolderBase]: 6122/9429 cut-off events. [2024-06-28 03:06:17,861 INFO L125 PetriNetUnfolderBase]: For 2249110/2249110 co-relation queries the response was YES. [2024-06-28 03:06:17,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104957 conditions, 9429 events. 6122/9429 cut-off events. For 2249110/2249110 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 56919 event pairs, 1213 based on Foata normal form. 2/9428 useless extension candidates. Maximal degree in co-relation 104770. Up to 9107 conditions per place. [2024-06-28 03:06:18,002 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 525 selfloop transitions, 94 changer transitions 0/622 dead transitions. [2024-06-28 03:06:18,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 622 transitions, 9215 flow [2024-06-28 03:06:18,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:06:18,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:06:18,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-28 03:06:18,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-28 03:06:18,004 INFO L175 Difference]: Start difference. First operand has 401 places, 595 transitions, 7757 flow. Second operand 8 states and 130 transitions. [2024-06-28 03:06:18,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 622 transitions, 9215 flow [2024-06-28 03:06:23,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 622 transitions, 9004 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-28 03:06:23,276 INFO L231 Difference]: Finished difference. Result has 404 places, 598 transitions, 7870 flow [2024-06-28 03:06:23,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7546, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7870, PETRI_PLACES=404, PETRI_TRANSITIONS=598} [2024-06-28 03:06:23,277 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-28 03:06:23,277 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 598 transitions, 7870 flow [2024-06-28 03:06:23,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:06:23,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:06:23,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:06:23,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-28 03:06:23,278 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:06:23,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:06:23,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1201735204, now seen corresponding path program 1 times [2024-06-28 03:06:23,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:06:23,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234321303] [2024-06-28 03:06:23,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:06:23,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:06:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:06:25,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:06:25,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:06:25,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234321303] [2024-06-28 03:06:25,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234321303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:06:25,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:06:25,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:06:25,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61970495] [2024-06-28 03:06:25,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:06:25,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:06:25,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:06:25,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:06:25,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:06:25,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:06:25,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 598 transitions, 7870 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:06:25,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:06:25,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:06:25,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:06:28,438 INFO L124 PetriNetUnfolderBase]: 6137/9450 cut-off events. [2024-06-28 03:06:28,438 INFO L125 PetriNetUnfolderBase]: For 2291712/2291716 co-relation queries the response was YES. [2024-06-28 03:06:28,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106121 conditions, 9450 events. 6137/9450 cut-off events. For 2291712/2291716 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 57076 event pairs, 1368 based on Foata normal form. 7/9454 useless extension candidates. Maximal degree in co-relation 105933. Up to 9354 conditions per place. [2024-06-28 03:06:28,619 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 590 selfloop transitions, 31 changer transitions 0/624 dead transitions. [2024-06-28 03:06:28,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 624 transitions, 9386 flow [2024-06-28 03:06:28,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:06:28,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:06:28,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-28 03:06:28,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-28 03:06:28,620 INFO L175 Difference]: Start difference. First operand has 404 places, 598 transitions, 7870 flow. Second operand 8 states and 126 transitions. [2024-06-28 03:06:28,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 624 transitions, 9386 flow [2024-06-28 03:06:34,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 624 transitions, 9084 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-28 03:06:34,111 INFO L231 Difference]: Finished difference. Result has 406 places, 601 transitions, 7752 flow [2024-06-28 03:06:34,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7568, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7752, PETRI_PLACES=406, PETRI_TRANSITIONS=601} [2024-06-28 03:06:34,111 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 363 predicate places. [2024-06-28 03:06:34,111 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 601 transitions, 7752 flow [2024-06-28 03:06:34,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:06:34,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:06:34,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:06:34,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-28 03:06:34,112 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:06:34,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:06:34,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1201585660, now seen corresponding path program 4 times [2024-06-28 03:06:34,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:06:34,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027749933] [2024-06-28 03:06:34,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:06:34,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:06:34,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:06:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:06:35,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:06:35,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027749933] [2024-06-28 03:06:35,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027749933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:06:35,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:06:35,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:06:35,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417991074] [2024-06-28 03:06:35,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:06:35,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:06:35,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:06:35,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:06:35,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:06:36,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:06:36,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 601 transitions, 7752 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:06:36,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:06:36,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:06:36,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:06:39,316 INFO L124 PetriNetUnfolderBase]: 6155/9475 cut-off events. [2024-06-28 03:06:39,316 INFO L125 PetriNetUnfolderBase]: For 2325683/2325683 co-relation queries the response was YES. [2024-06-28 03:06:39,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107126 conditions, 9475 events. 6155/9475 cut-off events. For 2325683/2325683 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 57202 event pairs, 1211 based on Foata normal form. 2/9474 useless extension candidates. Maximal degree in co-relation 106937. Up to 9098 conditions per place. [2024-06-28 03:06:39,490 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 523 selfloop transitions, 103 changer transitions 0/629 dead transitions. [2024-06-28 03:06:39,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 629 transitions, 9604 flow [2024-06-28 03:06:39,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:06:39,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:06:39,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-28 03:06:39,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-28 03:06:39,491 INFO L175 Difference]: Start difference. First operand has 406 places, 601 transitions, 7752 flow. Second operand 8 states and 129 transitions. [2024-06-28 03:06:39,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 629 transitions, 9604 flow [2024-06-28 03:06:44,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 629 transitions, 9452 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-28 03:06:44,571 INFO L231 Difference]: Finished difference. Result has 408 places, 607 transitions, 8082 flow [2024-06-28 03:06:44,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7600, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8082, PETRI_PLACES=408, PETRI_TRANSITIONS=607} [2024-06-28 03:06:44,571 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 365 predicate places. [2024-06-28 03:06:44,571 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 607 transitions, 8082 flow [2024-06-28 03:06:44,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:06:44,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:06:44,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:06:44,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-28 03:06:44,572 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:06:44,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:06:44,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1201585474, now seen corresponding path program 2 times [2024-06-28 03:06:44,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:06:44,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407817789] [2024-06-28 03:06:44,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:06:44,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:06:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:06:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:06:46,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:06:46,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407817789] [2024-06-28 03:06:46,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407817789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:06:46,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:06:46,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:06:46,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502967329] [2024-06-28 03:06:46,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:06:46,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:06:46,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:06:46,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:06:46,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:06:46,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:06:46,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 607 transitions, 8082 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:06:46,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:06:46,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:06:46,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:06:49,958 INFO L124 PetriNetUnfolderBase]: 6170/9496 cut-off events. [2024-06-28 03:06:49,959 INFO L125 PetriNetUnfolderBase]: For 2376886/2376890 co-relation queries the response was YES. [2024-06-28 03:06:50,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108355 conditions, 9496 events. 6170/9496 cut-off events. For 2376886/2376890 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 57399 event pairs, 1368 based on Foata normal form. 7/9500 useless extension candidates. Maximal degree in co-relation 108165. Up to 9410 conditions per place. [2024-06-28 03:06:50,105 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 596 selfloop transitions, 31 changer transitions 0/630 dead transitions. [2024-06-28 03:06:50,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 630 transitions, 9604 flow [2024-06-28 03:06:50,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:06:50,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:06:50,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-28 03:06:50,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-28 03:06:50,106 INFO L175 Difference]: Start difference. First operand has 408 places, 607 transitions, 8082 flow. Second operand 8 states and 123 transitions. [2024-06-28 03:06:50,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 630 transitions, 9604 flow [2024-06-28 03:06:55,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 630 transitions, 9354 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-28 03:06:55,998 INFO L231 Difference]: Finished difference. Result has 412 places, 610 transitions, 8024 flow [2024-06-28 03:06:55,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7832, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8024, PETRI_PLACES=412, PETRI_TRANSITIONS=610} [2024-06-28 03:06:56,000 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-28 03:06:56,000 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 610 transitions, 8024 flow [2024-06-28 03:06:56,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:06:56,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:06:56,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:06:56,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-28 03:06:56,002 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:06:56,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:06:56,003 INFO L85 PathProgramCache]: Analyzing trace with hash 680663149, now seen corresponding path program 1 times [2024-06-28 03:06:56,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:06:56,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988328051] [2024-06-28 03:06:56,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:06:56,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:06:56,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:06:57,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:06:57,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:06:57,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988328051] [2024-06-28 03:06:57,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988328051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:06:57,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:06:57,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:06:57,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221385999] [2024-06-28 03:06:57,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:06:57,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:06:57,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:06:57,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:06:57,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:06:58,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:06:58,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 610 transitions, 8024 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:06:58,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:06:58,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:06:58,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:07:01,056 INFO L124 PetriNetUnfolderBase]: 6175/9503 cut-off events. [2024-06-28 03:07:01,056 INFO L125 PetriNetUnfolderBase]: For 2395071/2395075 co-relation queries the response was YES. [2024-06-28 03:07:01,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109137 conditions, 9503 events. 6175/9503 cut-off events. For 2395071/2395075 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 57434 event pairs, 1367 based on Foata normal form. 5/9505 useless extension candidates. Maximal degree in co-relation 108945. Up to 9423 conditions per place. [2024-06-28 03:07:01,332 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 597 selfloop transitions, 31 changer transitions 0/631 dead transitions. [2024-06-28 03:07:01,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 631 transitions, 9466 flow [2024-06-28 03:07:01,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:07:01,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:07:01,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-28 03:07:01,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-28 03:07:01,334 INFO L175 Difference]: Start difference. First operand has 412 places, 610 transitions, 8024 flow. Second operand 8 states and 121 transitions. [2024-06-28 03:07:01,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 631 transitions, 9466 flow [2024-06-28 03:07:06,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 631 transitions, 9306 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-28 03:07:06,269 INFO L231 Difference]: Finished difference. Result has 414 places, 613 transitions, 8060 flow [2024-06-28 03:07:06,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7864, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8060, PETRI_PLACES=414, PETRI_TRANSITIONS=613} [2024-06-28 03:07:06,269 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 371 predicate places. [2024-06-28 03:07:06,269 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 613 transitions, 8060 flow [2024-06-28 03:07:06,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:07:06,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:07:06,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:07:06,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-28 03:07:06,270 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:07:06,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:07:06,271 INFO L85 PathProgramCache]: Analyzing trace with hash 887316372, now seen corresponding path program 3 times [2024-06-28 03:07:06,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:07:06,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260629093] [2024-06-28 03:07:06,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:07:06,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:07:06,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:07:08,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:07:08,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:07:08,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260629093] [2024-06-28 03:07:08,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260629093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:07:08,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:07:08,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:07:08,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849343531] [2024-06-28 03:07:08,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:07:08,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:07:08,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:07:08,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:07:08,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:07:08,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:07:08,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 613 transitions, 8060 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:07:08,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:07:08,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:07:08,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand